Islomov, B. I., N. K. Ochilova, and K. S. Sadarangani. “On a Frankl-Type Boundary-Value Problem for a Mixed-Type Degenerating Equation”. Ukrains’kyi Matematychnyi Zhurnal 71, no. 10 (February 9, 2026): 1347–1359. Accessed February 16, 2026. https://umj.imath.kiev.ua/index.php/umj/article/view/1519.