EDITORIALBOARD. On the 80th birthday of Academician Yu. A. Mitropol’skii. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 1, p. 3–4, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4981. Acesso em: 5 dec. 2025.