SkrypnikI. I. “Boundary Values of Solutions to Linear Second Order Parabolic Equations ”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 10 (October 1, 1992): 1433-1440. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8242.