Sixth-Order Stable Implicit Finite Difference Scheme for 2-D Heat Conduction Equation on Uniform Cartesian Grids with Dirichlet Boundaries. Punjab Univ. J. Math. 2025;51(5):27-42. Accessed October 27, 2025. https://pujm.pu.edu.pk/index.php/pujm/article/view/440