QUANG, L. D. Method of calculating the vertical velocity forced by the friction. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 3, n. 1, p. 28–31, 1981. DOI: 10.15625/0866-7136/10476. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10476. Acesso em: 5 may. 2024.