BerezanskyY. M., MitropolskiyY. A., & Shkhanukov-LafishevM. K. (1999). Stabilization for a finite time in problems with free boundary for some classes of nonlinear second-order equations. Ukrains’kyi Matematychnyi Zhurnal, 51(2), 214–223. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/4600