Nargis , Ikramova, and Abdukarimova Nozima. “Boundary Value Problem for a Model Parabolic-Hyperbolic Equation With Bitsadze-Samarskii Condition”. Miasto Przyszłości 60 (June 3, 2025): 816–823. Accessed June 27, 2025. https://miastoprzyszlosci.com.pl/index.php/mp/article/view/6553.