KOROLYUK, V. S.; LUKOVSKY, I. O.; PERESTYUK, N. A.; PRATSIOVYTYI, M. V.; SAMOILENKO, A. M.; YAKOVETS, V. P. Mykola Ivanovych Shkil’ (on his 80th birthday). Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 12, p. 1720–1722, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2693. Acesso em: 5 dec. 2025.