Romanyuk, A. S. and Samoilenko, A. M. (2008) “Bogolyubov Readings-2008. International Conference "Differential Equations, Theory of Functions and Applications" (on the occasion of the 70th anniversary of academician AM Samoilenko)”, Ukrains’kyi Matematychnyi Zhurnal, 60(12), p. 1722. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3285 (Accessed: 25April2024).