Romanyuk, A. S., Romanyuk, V. S., Savchuk, V. V., Samoilenko, A. M., Serdyuk, A. S. and Sokolenko, I. V. (2017) “Oleksandr Ivanovych Stepanets’ (on his 75th birthday)”, Ukrains’kyi Matematychnyi Zhurnal, 69(5), p. 579. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1718 (Accessed: 26April2024).