Ptashnik, B. I., and A. M. Samoilenko. “The Skorobogat’ko International Mathematical Conference”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 1 (January 25, 2005): 143-144. Accessed May 17, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3582.