Berehova, H. I., and V. M. Kirilich. “Hyperbolic Stefan Problem in a Curvilinear Sector”. Ukrains’kyi Matematychnyi Zhurnal 49, no. 12 (December 25, 1997): 1684–1689. Accessed May 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5173.