Aldibekov T. М., and M. M. Aldazharova. “Nonlinear Differential Equation With First Order Partial Derivatives”. Journal of Mathematics, Mechanics and Computer Science 99, no. 3 (December 21, 2018): 3–11. Accessed July 22, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/508.