DA, H. V. Solution of the partial derivative equation with nonlinear boundary conditions. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 9, n. 1, p. 16–21, 1987. DOI: 10.15625/0866-7136/10338. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/10338. Acesso em: 29 mar. 2024.