Berezovsky, A.A., Mitropolskiy, Y.A. and Shkhanukov-Lafishev, M.K. (1997) “Nonlinear nonlocal problems for a parabolic equation in a two-dimensional domain”, Ukrains’kyi Matematychnyi Zhurnal, 49(2), pp. 244–254. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5001 (Accessed: 6 December 2025).