Dragunov, D. V., Makarov, V. L. and Sember, D. A. (2012) “FD-method for solving the nonlinear Klein - Gordon equation”, Ukrains’kyi Matematychnyi Zhurnal, 64(10), pp. 1394-1415. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2667 (Accessed: 27April2024).