“Synthesis of Carbon Nanotubes from Graphite and Investigation of the Catalytic Activity of MWCNTs/Cr2O3–NiO with the Removal of Bismarсk Brown G Dye from Its Aqueous Solution”, Ukr. J. Phys., vol. 64, no. 4, p. 276, May 2019, doi: 10.15407/ujpe64.4.276.