A Four-State HLL Riemann Solver for Numerical Simulation of Magneto-Hydrodynamics Based on the Least Squares Solution for the Middle Wave. Commun. Comput. Phys. [Internet]. 2025 Sep. 2 [cited 2025 Dec. 5];37(3):675-700. Available from: https://global-sci.com/index.php/cicp/article/view/17107