A. F. Tedeev, “Qualitative properties of solutions of the Neumann problem for a higher-order quasilinear parabolic equation”, Ukr. Mat. Zhurn., vol. 45, no. 11, pp. 1571–1579, Nov. 1993, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5963