Nguyen, Manh Hung, and Trieu Duong Pham. 2004. “On the Smoothness of a Generalized Solution of the First Initial Boundary-Value Problem for Strongly Parabolic Systems in a Cylinder With Nonsmooth Base With Respect to Time Variable”. Ukrains’kyi Matematychnyi Zhurnal 56 (1), 78-87. https://umj.imath.kiev.ua/index.php/umj/article/view/3729.