EDITORIALBOARD. Index of volume 70 of „Ukrainian Mathematical Journal”. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 12, p. 1723–1728, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1671. Acesso em: 27 apr. 2025.