Anh NN, Hien HN, Trung MD. Numerical solution for the problem on spread of pollution in underground water in Hanoi. Vietnam J. Mech. [Internet]. 1995 Dec. 31 [cited 2025 Apr. 16];17(4):1-5. Available from: https://vjs.ac.vn/index.php/vjmech/article/view/10139