EDITORIALBOARD. Index of volume 54 of Ukrainian Mathematical Journal. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 12, p. 1723–1728, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4214. Acesso em: 6 dec. 2025.