Lang ND, Lich TG, Duc L. Two approximation methods of spatial derivatives on unstructured triangular meshes and their application in computing two dimensional flows. Vietnam J. Mech. [Internet]. 2006 Dec. 31 [cited 2024 May 2];28(4):230-4. Available from: https://vjs.ac.vn/index.php/vjmech/article/view/5584