Berezansky, Y. M., V. I. Gerasimenko, A. N. Kochubei, V. A. Mikhailets, L. P. Nizhnik, A. M. Samoilenko, Y. S. Samoilenko, and E. Y. Khruslov. “Myroslav L’vovych Horbachuk (on His 75 Th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 65, no. 3, Mar. 2013, pp. 451-4, https://umj.imath.kiev.ua/index.php/umj/article/view/2430.