Gusak, D. V., I. N. Kovalenko, A. M. Samoilenko, A. V. Skorokhod, and M. I. Yadrenko. “On the 75th Birthday of Vladimir Semenovich Korolyuk”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 52, no. 8, Aug. 2000, pp. 1011-3, https://umj.imath.kiev.ua/index.php/umj/article/view/4504.