S. S. Kovalenko, “Symmetry analysis and exact solutions of one class of (1 + 3)-dimensional boundary-value problems of the Stefan type”, Ukr. Mat. Zhurn., vol. 63, no. 10, pp. 1352–1359, Oct. 2011, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2811