AbdullayevF. G., SavchukV. V., SamoilenkoA. M., and SerdyukA. S. “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, no. 10 (October 25, 2018): 1439-1440. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1647.