EDITORIAL BOARD, . В Институте математики АН УСС. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 4, n. 3, p. 339–341, 1952. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6807. Acesso em: 6 dec. 2025.