MITROPOLSKIY, Yu. A.; STROK, V. V. 50 Years of “Ukrainskii Matematicheskii Zhurnal”. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 5, p. 579–580, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4644. Acesso em: 6 dec. 2025.