HUYNH, Van Quan. Application of the modified Euler-Lagrange equation to multi-degree-of-freedom problems. Journal of Transportation Science and Technology, [S. l.], v. 14, n. 1, p. 11–20, 2025. DOI: 10.55228/JTST.14(1).11-20. Disponível em: https://tst.ut.edu.vn/index.php/jtst/article/view/336. Acesso em: 10 may. 2026.