Sun, Zhengjia, Fuzheng Gao, Chao Wang, and Yi Zhang. “A Quadratic C0 Interior Penalty Method for the Quad-Curl Problem”. Mathematical Modelling and Analysis 25, no. 2 (March 18, 2020): 208-225. Accessed November 25, 2024. https://gc.vgtu.lt/index.php/MMA/article/view/9796.