EDITORIALBOARD. Yurii Serhiiovych Osypov (on his 75th birthday). Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 8, p. 1137–1139, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2791. Acesso em: 6 dec. 2025.