BerezanskyYu. M., MitropolskiyYu. A., and Shkhanukov-LafishevM. Kh. “Stabilization for a Finite Time in Problems With Free Boundary for Some Classes of Nonlinear Second-Order Equations”. Ukrains’kyi Matematychnyi Zhurnal 51, no. 2 (February 25, 1999): 214–223. Accessed November 28, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4600.