GORBACHUK, M. L.; ZADEREI, P. V.; LUKOVSKY, I. O.; MAKAROV, V. L.; MOTORNYI, V. P.; ROMANYUK, A. S.; SAMOILENKO, A. M.; SERDYUK, A. S.; SHARKO, V. V. Oleksandr Ivanovych Stepanets’ (on the 70 th anniversary of his birthday). Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 5, p. 579–581, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2598. Acesso em: 6 dec. 2025.