Berezovsky, A.A., Mitropolskiy, Y.A. and Shkhanukov-Lafishev, M.K. (1996) “Space-time localization in problems with free boundaries for a nonlinear second-order equation”, Ukrains’kyi Matematychnyi Zhurnal, 48(2), pp. 202–211. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5348 (Accessed: 5 December 2025).