Approximation Solution of Nonlinear Parabolic Partial Differential Equation via Mixed Galerkin Finite Elements Method with the Crank-Nicolson Scheme. Iraqi Journal of Science [Internet]. 2019 Feb. 28 [cited 2024 Jul. 5];60(2):353-61. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/602