Major Pylypovych Timan (on his 90th birthday) - Babenko, V. F.; Vakarchuk, S. B.; Motornyi, V. P.; Peleshenko, B. I.; Romanyuk, A. S.; Samoilenko, A. M.; Serdyuk, A. S.; Trigub, R. M. (Ukrains’kyi Matematychnyi Zhurnal, 2013)