Allahem, A. “A Study of Some New Inequalities for Galerkin Method for Model Diffusion Problem and Finite Element Basis”. Journal of Qassim University for Science 10, no. 2 (July 1, 2017): 137–152. Accessed November 21, 2024. https://jnsm.qu.edu.sa/index.php/jnm/article/view/1818.