EDITORIAL BOARD. Index of Volume 44 of “Ukrainian Mathematical Journal” . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 12, p. 1723–1729, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8199. Acesso em: 5 dec. 2025.