EDITORIAL BOARD. Dedicated to the 80th anniversary of O. Yu. Shmidt’s birth . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 23, n. 5, p. 579–580, 1971. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8327. Acesso em: 5 dec. 2025.