Balkizov, Zh.A., Z.Kh. Guchaeva, and A.Kh. Kodzokov. “Inner Boundary Value Problem With Displacement for a Second Order Mixed Parabolic-Hyperbolic Equation”. Bulletin of the Karaganda University. Mathematics Series 106, no. 2 (June 30, 2022): 59–71. Accessed September 4, 2025. http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/499.