EDITORIAL BOARD. Leonid Pavlovych Nizhnik (to 80th birthday anniversary). Methods of Functional Analysis and Topology, [S. l.], v. 21, n. 4, p. 299–301, 2015. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/619. Acesso em: 16 dec. 2025.