NGOC, D. M. A two-dimensional problem of filtration theory. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 7, n. 1, p. 14–19, 1985. DOI: 10.15625/0866-7136/10380. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10380. Acesso em: 5 may. 2024.