Slyusarchuk, V. Yu. “Method of Local Linear Approximation for Nonlinear Discrete Equations”. Ukrains’kyi Matematychnyi Zhurnal 71, no. 9 (September 25, 2019): 1284-1296. Accessed April 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1515.