Mitropolsky Yu. A., BerezovskyA. A., and PlotnitskyT. A. “Problems With Free Boundaries for the Nonlinear Evolution Equation in Problems of Metallurgy, Medicine, Ecology”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 1 (February 4, 1992): 67-76. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7796.