Bratiichuk, N.S., Gusak, D.V., Kovalenko, I.N., Portenko, N.I., Samoilenko, A.M. and Skorokhod, A.V. 2005. Volodymyr Semenovych Korolyuk (the 80th anniversary of his birth). Ukrains’kyi Matematychnyi Zhurnal. 57, 9 (Sep. 2005), 1155-1157.