SANH, D. On the motion of mechanical systems with unilateral constraints. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 6, n. 4, p. 26–32, 1984. DOI: 10.15625/0866-7136/10423. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10423. Acesso em: 26 apr. 2024.