BerzhanovA. B., and KurmangalievE. K. “Solution of a Countable System of Quasilinear Partial Differential Equations Multiperiodic in a Part of Variables”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 2 (February 25, 2009): 280-288. Accessed December 4, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3019.