EDITORIALBOARD. Index of volume 45 of „Ukrainian Mathematical Journal”. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 12, p. 1721–1727, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5984. Acesso em: 5 dec. 2025.