% RevTeX4 modification for the Ukrainian Journal of Physics.
% by Ivan Gandzha - gandzha-et-iop.kiev.ua
% Based on revtex4.cls, 10pt.rtx, article.cls, size10.clo
% Ver0.5 01-01-2010
% Ver0.6 28-12-2012, updated for Akademperiodika
% Ver0.7 18-08-2023, updated for cyrillic UTF8 encoding, doi, and citation block
\ProvidesPackage{ujp_UTF8}
% Options
% \usepackage[cyr]{ujp} for cyrillic
% \usepackage[web]{ujp} for web
% \usepackage[encyr]{ujp} for english paper in cyrillic volume
% \usepackage[sec]{ujp} for section
% \usepackage[nopacs]{ujp} for no udk or pacs / this option is no longer used
% \usepackage[nocpr]{ujp} for no copyright / this option is no longer used
% \usepackage[notitle]{ujp} for no titleblock (e.g., for preface)
% \usepackage[doi]{ujp} for doi
% \usepackage[cit]{ujp} for citation block

%\RequirePackage{cmap} % to provide correct cyrillic encoding in pdf - use pdflatex for compilation
\RequirePackage[T2A]{fontenc}
\RequirePackage{amsmath}
\RequirePackage{amstext}
\RequirePackage{amssymb}
\RequirePackage{bm}
\RequirePackage{graphicx}
\RequirePackage{epstopdf}
\RequirePackage{expl3}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%redefine Makeuppercase command using LaTeX3 command
\ExplSyntaxOn
\def\MakeUppercase{\text_uppercase:n}
\ExplSyntaxOff
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\topmargin=0.96cm% line at 2cm put \topmargin=-0.54cm
\headheight=0cm \oddsidemargin=-4.5mm \evensidemargin=-4.5mm
\textwidth=167.0mm  %column=85.6mm
\columnsep=5.0mm \columnseprule=0.5pt\textheight=206.0mm
\footskip=7mm \headsep=5mm
\def\column{81.0mm}
\setlength\belowcaptionskip{-6\p@}
\newlength{\tablesep}
\setlength{\tablesep}{-18\p@}
\mathindent=0pt % formulas flushed left
\setcounter{footnote}{1}

\clubpenalty=10000 %preventing a break after the first line of a paragraph
\widowpenalty=10000 %preventing a break before the last line of a paragraph

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%font definition as in article.cls size10.clo
\def\normalsize{%
   \@setfontsize\normalsize\@xpt{12.0}% as in size10.clo {11.5} is 10pt.rtx
   \abovedisplayskip 10\p@ \@plus2\p@ \@minus5\p@
   \belowdisplayskip \abovedisplayskip
   \abovedisplayshortskip  \abovedisplayskip
   \belowdisplayshortskip \abovedisplayskip
   \let\@listi\@listI
}%
\def\small{%
  \@setfontsize\small\@ixpt{11}%{10.5}%
  \abovedisplayskip 8.5\p@ \@plus3\p@ \@minus4\p@
  \belowdisplayskip \abovedisplayskip
  \abovedisplayshortskip \z@ \@plus2\p@
  \belowdisplayshortskip 4\p@ \@plus2\p@ \@minus2\p@
  \def\@listi{%
    \leftmargin\leftmargini
    \topsep 4\p@ \@plus2\p@ \@minus2\p@
    \parsep 2\p@ \@plus\p@ \@minus\p@
    \itemsep \parsep
  }%
}%
\def\footnotesize{%
  \@setfontsize\footnotesize\@viiipt{10.5pt}%
  \abovedisplayskip 6\p@ \@plus2\p@ \@minus4\p@
  \belowdisplayskip \abovedisplayskip
  \abovedisplayshortskip \z@ \@plus\p@
  \belowdisplayshortskip 3\p@ \@plus\p@ \@minus2\p@
  \def\@listi{%
    \leftmargin\leftmargini
    \topsep 3\p@ \@plus\p@ \@minus\p@
    \parsep 2\p@ \@plus\p@ \@minus\p@
    \itemsep \parsep
  }%
}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\@udk{}
\def\udk#1{\def\@udk{#1}}
\def\@pacs{}
\def\pacs#1{\def\@pacs{#1}}
\def\@razd{}
\def\razd#1{\def\@razd{\MakeUppercase{#1}}}
\def\flagcyr{00} % true
%\def\flagpacs{00} % true
\def\flagpacs{01} % false
\def\flagdoi{01} % false
\def\flagcitcyr{01} % false
\def\flagcit{01} % false
%\def\flagcopyright{00} % true
\def\flagcopyright{01} % false
\def\flagtitle{00} % true
\newcommand\cit[2]{\def\@cit{#1}\def\@citb{#2}}
\cit{}{}

%\def\year{ZZZZ}
\newcounter{volume}
\setcounter{volume}{\the\year}
\addtocounter{volume}{-1955}
\newcounter{jnumber}
\setcounter{jnumber}{0}
\def\doilink{https://doi.org/10.15407/ujpe\thevolume.\thejnumber.\thepage}
\def\ISSN{2071-0186}
\def\vol{Vol.~}
\def\num{No.~}
\def\journal{Ukr.~J.~Phys.}
\def\journalb{\textcyrillic{Укр.~фіз.~журн.}}
\def\numb{\textcyrillic{№~}}
\def\citname{C\,i\,t\,a\,t\,i\,o\,n: }
\def\citnameb{\textcyrillic{Ц\,и\,т\,у\,в\,а\,н\,н\,я: }}
\def\udkpacs{PACS}
\def\udkpacsnum{\@pacs}
\def\keywordname{K\,e\,y\,w\,o\,r\,d\,s}
\def\etal{ et al.}
\def\fnum@figure{\footnotesize {\bfseries\itshape Fig.~\thefigure.}\normalfont}
\renewcommand\thetable{\@arabic\c@table}
\def\fnum@table{\vspace{\tablesep}\footnotesize{\it Table~\thetable.}\normalfont\bf}
\def\razdelblock{}
\def\seci{Fields and elementary particles}
\def\secii{Optics, atoms and molecules}
\def\seciii{General physics}
\def\seciv{Plasma physics}
\def\secv{Physics of liquids and liquid systems, biophysics and medical physics}
\def\secvi{Liquid crystals and polymers}
\def\secvii{Semiconductors and dielectrics}
\def\secviii{Physics of magnetic phenomena and physics of ferroics}
\def\secix{Surface physics}
\def\secx{Structure of materials}
\def\secxi{Chronicle}
\def\bitp{Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine}
\def\bitpaddr{14b, Metrolohichna Str., Kyiv 03680, Ukraine}
\def\iop{Institute of Physics, Nat. Acad. of Sci. of Ukraine}
\def\iopaddr{46, Prosp. Nauky, Kyiv 03028, Ukraine}
\def\isp{V.E. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine}
\def\ispaddr{41, Prosp. Nauky, Kyiv 03680, Ukraine}
\def\kinr{Institute for Nuclear Research, Nat. Acad. of Sci. of Ukraine}
\def\kinraddr{47, Prosp. Nauky, Kyiv 03680, Ukraine}
\def\knu{Taras Shevchenko National University of Kyiv}
\def\knuaddr{2, Prosp. Academician Glushkov, Kyiv 03022, Ukraine}
\def\lnu{Ivan Franko National University of L'viv}
\def\lnuaddr{8, Kyrylo i Mefodiy Str., Lviv 79005, Ukraine}
\def\kipt{National Science Center ``Kharkov Institute of Physics and Technology'',\\ Nat. Acad. of Sci. of Ukraine}
\def\kiptaddr{1, Akademichna Str., Kahrkiv 61108, Ukraine}

\DeclareOption{doi}
   {\def\flagdoi{00} % true
   }
\DeclareOption{cit}
   {\def\flagcit{00} % true
   }
\DeclareOption{cyr}
   {\def\ISSN{0372-400X}
    \def\vol{\textcyrillic{Т}.~}
    \def\num{\textcyrillic{№~}}
    \def\journal{\textcyrillic{Укр.~фіз.~журн.}}
    \def\journalb{Ukr.~J.~Phys.}
    \def\numb{No.~}
    \def\citname{\textcyrillic{Ц\,и\,т\,у\,в\,а\,н\,н\,я: }}
    \def\citnameb{C\,i\,t\,a\,t\,i\,o\,n: }
    \def\udkpacs{\textcyrillic{УДК}}
    \def\udkpacsnum{\@udk}
    \def\keywordname{\textcyrillic{К\,л\,ю\,ч\,о\,в\,і\, с\,л\,о\,в\,а}}
    \def\etal{ \textcyrillic{та ін.}}
    \def\fnum@figure{\footnotesize {\bfseries\itshape\textcyrillic{Рис.}~\thefigure.}\normalfont}
    \def\fnum@table{\vspace{\tablesep}\footnotesize{\it \textcyrillic{Таблиця}~\thetable.}\normalfont\bf}
    \def\seci{\textcyrillic{Поля та елементарні частинки}}
    \def\secii{\textcyrillic{Оптика, атоми і молекули}}
    \def\seciii{\textcyrillic{Загальна фізика}}
    \def\seciv{\textcyrillic{Фізика плазми}}
    \def\secv{\textcyrillic{Фізика рідин та рідинних систем, біофізика і медична фізика}}
    \def\secvi{\textcyrillic{Рідкі кристали та полімери}}
    \def\secvii{\textcyrillic{Напівпровідники і діелектрики}}
    \def\secviii{\textcyrillic{Фізика магнітних явищ і фізика фероїків}}
    \def\secix{\textcyrillic{Фізика поверхні}}
    \def\secx{\textcyrillic{Структура речовини}}
    \def\secxi{\textcyrillic{Хроніка}}
    \def\bitp{\textcyrillic{Інститут теоретичної фізики ім. М.М. Боголюбова НАН України}}
    \def\bitpaddr{\textcyrillic{Вул. Метрологічна, 14b, Київ 03143}}
    \def\iop{\textcyrillic{Інститут фізики НАН України}}
    \def\iopaddr{\textcyrillic{Просп. Науки, 46, Київ 03028}}
    \def\isp{\textcyrillic{Інститут фізики напівпровідників ім. В.Є. Лашкарьова НАН України}}
    \def\ispaddr{\textcyrillic{Просп. Науки, 41, Київ 03680}}
    \def\kinr{\textcyrillic{Інститут ядерних досліджень НАН України}}
    \def\kinraddr{\textcyrillic{Просп. Науки, 47, Київ 03680}}
    \def\knu{\textcyrillic{Київський національний університет ім. Тараса Шевченка}}
    \def\knuaddr{\textcyrillic{Просп. Академіка Глушкова, 2, Київ 03022}}
    \def\lnu{\textcyrillic{Львівський національний університет ім. Івана Франка}}
    \def\lnuaddr{\textcyrillic{Вул. Кирила і Мефодія, 8, Львів 79005}}
    \def\kipt{\textcyrillic{Національний науковий центр ``Харківський фізико-технічний інститут'' \\ НАН України}}
    \def\flagcyr{01} % false
    \def\flagcitcyr{00} % true
    \def\flagdoi{01}
   }
\DeclareOption{encyr}
   {\def\ISSN{0372-400X}
    \def\vol{\textcyrillic{Т}.~}
    \def\num{\textcyrillic{№~}}
    \def\journal{\textcyrillic{Укр.~фіз.~журн.}}
    \def\journalb{Ukr.~J.~Phys.}
    \def\numb{No.~}
    \def\citname{\textcyrillic{Ц\,и\,т\,у\,в\,а\,н\,н\,я: }}
    \def\citnameb{C\,i\,t\,a\,t\,i\,o\,n: }
    \def\udkpacs{\textcyrillic{UDC}}
    \def\udkpacsnum{\@udk}
    \def\keywordname{\textcyrillic{K\,e\,y\,w\,o\,r\,d\,s}}
    \def\seci{\textcyrillic{Поля та елементарні частинки}}
    \def\secii{\textcyrillic{Оптика, атоми і молекули}}
    \def\seciii{\textcyrillic{Загальна фізика}}
    \def\seciv{\textcyrillic{Фізика плазми}}
    \def\secv{\textcyrillic{Фізика рідин та рідинних систем, біофізика і медична фізика}}
    \def\secvi{\textcyrillic{Рідкі кристали та полімери}}
    \def\secvii{\textcyrillic{Напівпровідники і діелектрики}}
    \def\secviii{\textcyrillic{Фізика магнітних явищ і фізика фероїків}}
    \def\secix{\textcyrillic{Фізика поверхні}}
    \def\secx{\textcyrillic{Структура речовини}}
    \def\secxi{\textcyrillic{Хроніка}}
    \def\flagcitcyr{00} % true
    \def\flagdoi{01}
   }
\DeclareOption{web}
   {\def\ISSN{2071-0194}
   }
\DeclareOption{sec}
   {\def\razdelblock{
    \thispagestyle{empty}%
    \vspace*{-11.5mm}%
    \vbox{\hbox{{\raggedright\bfseries\sf\Large\raisebox{0pt}{\hspace{0mm}\parbox[t]{167mm}\@razd}\vspace{-2.5mm}\strut\hfil}}
    \hbox{\rule{\textwidth}{0.5pt}}\vspace{4mm}}
    \vspace*{18.5mm}%

%     \noindent\raisebox{-194.0mm}[0pt][0pt]{\vbox{\hbox{\hspace{0mm}\parbox[t]{81mm}
%        {\copyright\year}}}}

    \ifodd\thepage
        \noindent\raisebox{-188.0mm}[0pt][0pt]{\vbox{\hbox to\textwidth
        {{\small\it ISSN~\ISSN.~\journal~\the\year.~\vol\thevolume,~\num\thejnumber} \hfil \large\bf\thepage}
        }}
    \else
         \noindent\raisebox{-188.0mm}[0pt][0pt]{\vbox{\hbox to\textwidth
    {{\small{\large\bf\thepage} \hfil\it ISSN~\ISSN.~\journal~\the\year.~\vol\thevolume,~\num\thejnumber}}
        }}
    \fi
    }
   }
\DeclareOption{nopacs}
   {\def\flagpacs{01} % false
   }
\DeclareOption{nocpr}
   {\def\flagcopyright{01} % false
   }
\DeclareOption{notitle}
   {\def\flagtitle{01} % false
   }
\ProcessOptions

\if\flagcyr\RequirePackage[ukrainian,english]{babel}
\else\RequirePackage[english,ukrainian]{babel} \fi

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% abstract and resume
%\renewenvironment{abstract}{
%\fussy\noindent\footnotesize\kern-0pt}
%{\\
%\rule{81.0mm}{0.3pt}\vspace{4mm}\par}

\renewenvironment{abstract}{%
  \aftermaketitle@chk{\begin{abstract}}%
  \global\setbox\absbox\vbox\bgroup
   \color@begingroup
   \columnwidth\textwidth
   \hsize\frontmatter@abstractwidth
   \@parboxrestore
   \def\@mpfn{mpfootnote}\def\thempfn{\thempfootnote}\c@mpfootnote\z@
   \let\@footnotetext\frontmatter@footnotetext
   \minipagefootnote@init
   \let\@listdepth\@mplistdepth \@mplistdepth\z@
   \@minipagerestore
   \@setminipage
    \frontmatter@abstractheading
    \frontmatter@abstractfont
    \let\footnote\mini@note
}{%
    \par
    \unskip
    \minipagefootnote@here
    \@minipagefalse   %% added 24 May 89
    \color@endgroup
  \egroup
}%
\def\frontmatter@abstractfont{\it\small}%
\def\frontmatter@abstractwidth{13.2cm}
\def\frontmatter@preabstractspace{-3pt}

\newcommand{\rezume}[4]{\footnotesize
{\vspace{5mm}%
\noindent {\it#1}\\*[1.5mm]%\MakeUppercase
{#2}\\*[2mm]%
%\textcyrillic{Р~е~з~ю~м~е}\\*[2mm]%
#3}\\[2mm]
{#4}}
%
\newcommand{\rezumang}[4]{\footnotesize
{\vspace{5mm}%
\noindent\footnotesize{\it#1}\\*[1.5mm]%\MakeUppercase
{#2}\\*[2mm]\selectlanguage{english}%
#3}\\*[2mm]%
%S~u~m~m~a~r~y\\*[2mm]
{#4}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% heading parameters for maketitle

%\def\frontmatter@title@above{\vspace{-11pt}}
\def\frontmatter@title@above{\vspace{6pt}}
\def\frontmatter@title@format{\raggedright\large\bf}
\def\frontmatter@title@below{\vspace{0pt}}
\def\frontmatter@authorformat{\small\selectfont}
\def\frontmatter@above@affiliation@script{\vspace{0pt}}%
\def\frontmatter@above@affiliation{\vspace{0pt}}
\def\frontmatter@affiliationfont{\footnotesize\vspace{3pt}}%

\newcounter{tempavt}%running author number in the author heading
\setcounter{tempavt}{1}
\def\@avtorcol{}
\def\doauthor#1#2#3{%
  \ifnum\arabic{tempavt}=1
        {\gappdef\@avtorcol{#1}} % avtorcol
        \else
        {\ifnum\arabic{tempavt}<100
               {\gappdef\@avtorcol{, #1}}
               \else
               {\ifnum\arabic{tempavt}=100
                      {\gappdef\@avtorcol{\etal}}
                      \else
                      \fi\unskip
               }
               \fi\unskip
        }
        \fi\unskip
        \addtocounter{tempavt}{1}
  \ignorespaces#1\unskip\@listcomma@comma %instead of \@listcomma to suppress and
  \def\@tempifx{#3}%
  \@ifx{\@tempifx\@empty}{%
   \def\@tempifx{#2}%
   \@ifx{\@tempifx\@empty}{}{\frontmatter@footnote{#2}}%
  }{%
   #3%
   \def\@tempifx{#2}%
   \@ifx{\@tempifx\@empty}{}{\comma@space\frontmatter@footnote{#2}}%
  }%
  %\space
  \@listand
}%

\def\@listand{\@ifnum{\@tempcnta=\tw@}{}{}}% to suppress and
\def\cat@comma@active{}%\catcode`\,\active}%No comma splitting
\def\@email#1#2{%
 \endgroup
 \@AF@join{#1#2}%
}%
\renewcommand*\email[1][e-mail: ]{\begingroup\sanitize@url\@email{#1}}%e-mail instead of Electronic address
\def\MakeTextUppercase{} % to make section headings lowercase

\def\address{\replace@command\address\thanks}

\def\@affil@script#1#2#3{%
 \@ifnum{#1=\z@}{}{%
  \par
  \begingroup
   \frontmatter@affiliationfont
   \textsuperscript{#1}%
   \hspace*{0.5mm}#2%
   \@if@empty{#3}{}{\par\it \hspace*{1.5mm}(#3)\vspace*{-1mm}}%між адресами
   \par
  \endgroup
 }%
}%

\def\@affil@group#1#2#3{%
  \@ifnum{\count@=#1\relax}{%
    \@ifx{#2\blankaffiliation}{}{%
#2%
\@if@empty{#3}{}{%
%\frontmatter@footnote{#3}%
\par {\it (#3)\vspace*{-1mm}}
}%
\after@address
    }%
    \advance\@tempcnta\m@ne
  }{}%
}%

\def\frontmatter@keys@format{\small}
\def\@keywords@produce#1{%
 \showKEYS@sw{%
  \begingroup
   \frontmatter@keys@format
%   {\it К\,л\,ю\,ч\,о\,в\,і\, с\,л\,о\,в\,а: }#1\par
   {\it \keywordname{\rm :} }#1\par
  \endgroup
 }{%
  \@if@empty{#1}{}{%
   \class@warn{If you want your keywords to appear in your output, use document class option showkeys}%
  }%
 }%
}%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% TITLEPAGE
\renewcommand\title[2][]{%
 \def\@title{{#2}}% to make title in uppercase
 \def\@shorttitle{{\textcyrillic{#1}}}%
 \let\@AF@join\@title@join
}%
\def\@author@def#1#2{%
 \move@AU\move@AF\move@AUAF
 \let\@AF@join\@author@join
 #1%
 \def\@author{{\MakeUppercase{#2}}{}}% to make authors in uppercase
 %\def\@author{{#2}{}}
}%

\renewcommand{\maketitle}{
\onecolumngrid \if\flagtitle{ \razdelblock \vbox{\vspace*{1mm}\hbox{
\kern-3.2pt\rule[1em]{30mm}{0.5pt}\hspace{4.6mm}\parbox[t]{132mm}%
%\vbox{\hbox{
%\raisebox{-82pt}[0pt][0mm]{\includegraphics[height=28mm]{logotip.eps}}\hspace{11.5mm}\parbox[t]{135mm}%
{{\vspace*{-3.8mm}}\raggedright
\if\flagdoi {\scriptsize \doilink}\\ \vspace*{2mm}\else \fi
%\frontmatter@title@produce
\@author@finish \ifnum\theaffil=1
      {\frontmatter@author@produce@group\vspace{-3pt}}
      \else
      {\frontmatter@author@produce@script}
      \fi
\vspace{1mm} \frontmatter@title@produce
%\frontmatter@abstract@produce
} } {\scriptsize
\if\flagcyr\else\vspace{-6pt}\noindent{\udkpacs~\udkpacsnum}\fi
\vspace{-13pt}%{-6pt}
\if\flagpacs\noindent{\udkpacs~\udkpacsnum}\\[-12pt]
\else \noindent\\\fi \if\flagcopyright{\bf\copyright\the\year} \else
{}\fi \vspace{-1.0mm} }
\par
\hbox{\rule{\textwidth}{0.5pt}}\vspace{7mm} }
   \hbox{\hspace{34.6mm}\parbox[b]{132mm}
   {\phantom{}
   \frontmatter@abstract@produce
\vspace{-5.5pt}
   \@keywords@produce\@keywords
   }}
\vspace{5.0mm} } \else{
\def\frontmatter@title@above{\vspace*{5mm}}
\def\frontmatter@title@format{\large\bf}
\centering\frontmatter@title@produce \vspace{7mm} } \fi
\twocolumngrid
\if\flagcit
\blfootnote{\hspace*{-0.3cm}\parbox[b]{8cm}{%\raggedright
\leftmargini0.42cm
%\begin{itemize}
\parskip-1.0cm
%\item[\copyright]
%\@avtorcol,~2022\vspace*{-1.5mm}
%\end{itemize}
{\footnotesize{\citname\@cit\ \textit{\journal}\ \textbf{\thevolume},\ \num\thejnumber, \thepage\ (\the\year).\if\flagcitcyr{}\else{ \doilink.}\fi}\\
\footnotesize{\citnameb\@citb\ \textit{\journalb}\ \textbf{\thevolume},\ \numb\thejnumber, \thepage\ (\the\year).\if\flagcitcyr{ \doilink.}\else{}\fi}}
%{\let\\=\relax\MakeTextUppercase{\@title}}
%\vspace*{-0.5mm}
}}
\else \fi
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Running heads
\def\autorcol#1{\def\@autorcol{#1}}

\newcommand{\@evenhead}%
{\raisebox{0pt}[\headheight][0pt]%
{\vbox{\hbox to\textwidth{%
\strut\scriptsize\it\@autorcol\strut\hfil}\kern-0pt\hrule height 0.5pt}}%
}
\newcommand{\@oddhead}%
{\raisebox{0pt}[\headheight][0pt]%
{\vbox{\hbox to\textwidth{%
\hfil\strut\scriptsize\it\@shorttitle}\hrule height 0.5pt}}%
}
\newcommand{\@evenfoot}
{\small{\large\bf\thepage} \hfil\it
ISSN~\ISSN.~\journal~\the\year.~\vol\thevolume,~\num\thejnumber}
\newcommand{\@oddfoot}
{{\small\it
ISSN~\ISSN.~\journal~\the\year.~\vol\thevolume,~\num\thejnumber}%
\hfil \large\bf\thepage}

%\renewcommand{\sectionmark}[1]{\markright%пробіл після номера в колонтитулі
%{\thesection.\hspace{1.0mm}#1}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% sections
\renewcommand\section{\@startsection{section}{1}{0pt}%
                                    {-2.5ex \@plus -1ex \@minus -.2ex}%
                                    {1.5mm
                                    %\@plus.2ex
                                    }%
                                    {\raggedright\normalfont\normalsize\bfseries}}

\renewcommand\subsection{\@startsection{subsection}{2}{\z@}%
                                      {-2.25ex\@plus -1ex \@minus -.2ex}%
                                      {1.5mm}%
                                      {\raggedright\normalfont\normalsize\bfseries\itshape}}
\renewcommand\subsubsection{\@startsection{subsubsection}{3}{\z@}%
                                      {-3.25ex\@plus -1ex \@minus -.2ex}%
                                      {2mm}%
                                      {\normalfont\footnotesize\bfseries}}

\renewcommand\paragraph{\@startsection{paragraph}{4}{\z@}%
                                     {3.25ex \@plus1ex \@minus.2ex}%
                                     {-1em}%
                                     {\normalfont\normalsize\bfseries}}
\renewcommand\subparagraph{\@startsection{subparagraph}{5}{\parindent}%
                                        {3.25ex \@plus1ex \@minus .2ex}%
                                        {-1em}%
                                       {\normalfont\normalsize\bfseries}}
\renewcommand\thesection{\@arabic\c@section{}}%{\@arabic\c@section{.}}
\renewcommand\thesubsection{\thesection.\@arabic\c@subsection{}}

%\def\@startsection#1#2#3#4#5#6{%
%  \@startsection@hook
%  \if@noskipsec \leavevmode \fi
%  \par
%  \@tempskipa #4\relax
%  \@afterindenttrue
%  \ifdim \@tempskipa <\z@
%    \@tempskipa -\@tempskipa \@afterindentfalse
%  \fi
%  \if@nobreak
%    \everypar{}%
%  \else
%    \addpenalty\@secpenalty\addvspace\@tempskipa
%  \fi
%  \@ifstar
%    {\@ssect{#3}{#4}{#5}{#6}}% this part was replaced from latex.ltx to make the indent-alignment of the section text
%    {\@dblarg{\@sect{#1}{#2}{#3}{#4}{#5}{#6}}}} % this part was replaced from latex.ltx to make the indent-alignment of the section text

\def\@seccntformat#1{\csname the#1\endcsname.\hspace*{1mm}}%smaller indent between the number and the text

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Bibliography
\RequirePackage{natbib}
\bibpunct{[}{]}{,\!}{n}{,}{,}
\renewcommand{\bibnumfmt}[1]{#1.}
\renewcommand{\bibfont}{\footnotesize}
%\setlength\bibsep{3pt plus 1pt minus 1pt}
\setlength\bibsep{0pt plus 0pt minus 0pt}
\renewcommand{\bibsection}{\par\vspace{12pt}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%figures and tables
\long\def\@makecaption#1#2{%
  \par
  \vskip\abovecaptionskip
  \begingroup
   \small\rmfamily
   \sbox\@tempboxa{%
    \let\\\heading@cr
    #1 #2%
   }%
%   \@ifdim{\wd\@tempboxa >\hsize}{% when the table caption fills only one row, it remains to be flushed
    \begingroup
     \samepage
     \flushing
     \let\footnote\@footnotemark@gobble
     #1 #2\par
    \endgroup
%   }%{%
%     \global \@minipagefalse
%     \hb@xt@\hsize{\hfil\unhbox\@tempboxa\hfil}%
%   }%
  \endgroup
  \vskip\belowcaptionskip
}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\skip\footins 12pt plus 4pt minus 2pt %39pt plus 4pt minus 2pt
\def\footnoterule{\kern0pt\hrule width2cm\kern6.6pt\relax}%

\makeatletter
\def\blfootnote{\xdef\@thefnmark{}\@footnotetext}
\makeatother