Lukovsky, I. O., Y. A. Mitropolskiy, G. N. Polozhii, and A. M. Samoilenko. “Vladimir Nikolaevich Koshlyakov (On His 80th Birthday)”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 54, no. 12, Dec. 2002, pp. 1587-8, https://umj.imath.kiev.ua/index.php/umj/article/view/4196.