SkrypnikI. I. “Regularity of a Boundary Point for Degenerate Parabolic Equations With Measurable Coefficients”. Ukrains’kyi Matematychnyi Zhurnal 52, no. 11 (November 25, 2000): 1550-1565. Accessed November 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4560.