Martynenko, A. V., A. F. Tedeev, and V. N. Shramenko. 2012. “On the Behavior of Solutions of the Cauchy Problem for a Degenerate Parabolic Equation With Source in the Case Where the Initial Function Slowly Vanishes”. Ukrains’kyi Matematychnyi Zhurnal 64 (11), 1500-1515. https://umj.imath.kiev.ua/index.php/umj/article/view/2676.