Bogolyubov, A. N. “Jubilees Iosyp Zakharovych Shtokalo (on the 100th Anniversary of His Birth)”. Ukrains’kyi Matematychnyi Zhurnal 50, no. 8 (August 25, 1998): 1152–1153. Accessed February 17, 2026. https://umj.imath.kiev.ua/index.php/umj/article/view/4866.