Babenko, V. F., S. B. Vakarchuk, V. P. Motornyi, B. I. Peleshenko, A. S. Romanyuk, A. M. Samoilenko, A. S. Serdyuk, and R. M. Trigub. “Major Pylypovych Timan (on His 90th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 65, no. 8, Aug. 2013, pp. 1141-4, https://umj.imath.kiev.ua/index.php/umj/article/view/2496.