Lich, Tran Gia, Nguyen Minh Son, and Le Viet Cuong. 2003. “Calculation of the Horizontal Two-Dimensional Unsteady Flows by the Method of Characteristics”. Vietnam Journal of Mechanics 25 (1). Hanoi, Vietnam:49-64. https://doi.org/10.15625/0866-7136/25/1/6578.