Horodets’kyi , V. V., O. V. Martynyuk, and R. I. Petryshyn. “On Generalized Cauchy Problem for One Class of Differential Equation of Infinite Order”. Ukrains’kyi Matematychnyi Zhurnal 72, no. 7 (July 15, 2020): 886-902. Accessed August 12, 2020. http://umj.imath.kiev.ua/index.php/umj/article/view/2321.