IsaryukI. M., and PukalskyiI. D. “Boundary-Value Problem With Impulsive Conditions and Degeneration for Parabolic Equations”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 67, no. 10, Oct. 2015, pp. 1348-57, https://umj.imath.kiev.ua/index.php/umj/article/view/2071.