Mitropolsky Y. A., BerezovskyA. A., & PlotnitskyT. A. (1992). Problems with free boundaries for the nonlinear evolution equation in problems of metallurgy, medicine, ecology. Ukrains’kyi Matematychnyi Zhurnal, 44(1), 67-76. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/7796