SANH, D. On the motion of a system with program constraints of inequality type. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 8, n. 1, p. 19–24, 1986. DOI: 10.15625/0866-7136/10359. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10359. Acesso em: 24 apr. 2024.