Abdullayev, F.G., Savchuk, V.V., Samoilenko, A.M. and Serdyuk, A.S. 2018. International conference on the mathematical analysis, differential equations, and their applications (MADEA-8) devoted to the 80th birthday of Academician A. M. Samoilenko. Ukrains’kyi Matematychnyi Zhurnal. 70, 10 (Oct. 2018), 1439-1440.