Pukalskiy, I.D. “The Problem With Inclined Derivative for a Parabolic Equations With Impulse Conditions and Degeneration”. Carpathian Mathematical Publications 6, no. 2 (December 27, 2014): 342–350. Accessed May 4, 2024. https://scijournals.pnu.edu.ua/index.php/cmp/article/view/1366.