EDITORIAL BOARD, . Index of volume 73 of „Ukrainian Mathematical Journal”. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 12, p. 1723–1728, 2021. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7046. Acesso em: 14 apr. 2025.