Zh.N. Tasmambetov, N. Rajabov, и Zh.K.Ubayeva. «THE COORDINATED SOLUTION OF TWO DIFFERENTIAL EQUATIONS IN PRIVATE DERIVATIVES OF THE THIRD ORDER». Известия НАН РК. Серия физико-математическая, no. 4 (август 10, 2019): 83–91. просмотрено декабрь 23, 2024. http://89.250.84.46/physics-mathematics/article/view/1679.