BOGOLYUBOV, A. N. Jubilees Iosyp Zakharovych Shtokalo (on the 100th anniversary of his birth). Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 8, p. 1152–1153, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4866. Acesso em: 5 dec. 2025.