Bich, Dao Huy, and Nguyen Dang Bich. “On a Class of Non-Linear Differential Equations With Exact Solution”. <i>Vietnam Journal of Mechanics</i> 34, no. 1 (March 1, 2012): 7–17. Accessed November 8, 2025. https://vjmech.vast.vn/vjmech/article/view/424.