M. Šayar, Z. Virag, and R. Korbar, “A variant of the method of characteristics”, CAMES, vol. 9, no. 4, pp. 543–553, Feb. 2023, Accessed: Jan. 12, 2025. [Online]. Available: https://cames3.ippt.pan.pl/index.php/cames/article/view/1117