“PROBLEMS WITH INTEGRAL AND BITSADZE-SAMARSKY CONDITION FOR A SECOND-ORDER PARABOLIC-HYPERBOLIC EQUATION WITH A SINGULAR COEFFICIENT ”, SJFSU, vol. 28, no. 2, p. 43, Jul. 2023, Accessed: Dec. 25, 2025. [Online]. Available: https://journal.fdu.uz/index.php/sjfsu/article/view/1940