Zhunussova, Zh.Kh. “The Surface to Singular Solitonic Solution of the Nonlinear Schrodinger Equation”. Bulletin of the Karaganda University. Mathematics Series 88, no. 4 (December 29, 2017): 26–33. Accessed July 10, 2025. https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/175.