An Efficient Implementation of the Divergence Free Constraint in a Discontinuous Galerkin Method for Magnetohydrodynamics on Unstructured Meshes. Commun. Comput. Phys. [Internet]. 2018 Apr. 8 [cited 2025 Dec. 5];21(2):423-42. Available from: https://www.global-sci.com/index.php/cicp/article/view/6407