Thang, Duong Tat, and Dao Huy Bich. “On the Propagation of Waves in the Elasto- Plastic Medium With Complex Loading”. <i>Vietnam Journal of Mechanics</i> 9, no. 1 (March 30, 1987): 1–7. Accessed December 6, 2025. https://vjs.ac.vn/vjmech/article/view/10336.