Ivanchov, N. I., and N. M. Hryntsiv. “Inverse Problem for the Strongly Degenerate Heat Equation in a Domain With Free Boundary”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 1 (January 25, 2009): 28-43. Accessed May 5, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2998.