Bich, Nguyen Dang, and Nguyen Vo Thong. “Some Solvable Non-Linear Equations Related to Aerodynamic Instability Phenomena”. Vietnam Journal of Mechanics 16, no. 4 (December 31, 1994): 11–14. Accessed November 9, 2025. https://vjmech.vast.vn/vjmech/article/view/10176.