NGOC, Dao Minh. A two-dimensional problem of filtration theory. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 7, n. 1, p. 14–19, 1985. DOI: 10.15625/0866-7136/10380. Disponível em: https://vjmech.vast.vn/vjmech/article/view/10380. Acesso em: 9 nov. 2025.