ROMANYUK, A. S.; ROMANYUK, V. S.; SAVCHUK, V. V.; SAMOILENKO, A. M.; SERDYUK, A. S.; SOKOLENKO, I. V. Oleksandr Ivanovych Stepanets’ (on his 75th birthday). Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 5, p. 579, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1718. Acesso em: 5 dec. 2025.