“Academician of the National Academy of Sciences of Ukraine Marat Terentiyovych Shpak (to the 90-Th Anniversary of His Birthday)”. Ukrainian Journal of Physics 61, no. 11 (January 4, 2019): 1026. Accessed September 10, 2026. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019019.