Isaryuk, I. M., and I. D. Pukalskyi. 2015. “Boundary-Value Problem With Impulsive Conditions and Degeneration for Parabolic Equations”. Ukrains’kyi Matematychnyi Zhurnal 67 (10), 1348-57. https://umj.imath.kiev.ua/index.php/umj/article/view/2071.