Verfiirth, Rudiger. “A Posteriori Error Estimation Techniques for Non-Linear Elliptic and Parabolic Pdes”. European Journal of Computational Mechanics 9, no. 4 (April 7, 2000): 377–402. Accessed November 15, 2024. https://journals.riverpublishers.com/index.php/EJCM/article/view/2909.