“On the Convergence of the Nonnested V-Cycle Multigrid Method for Nonsymmetric and Indefinite Second-Order Elliptic Problems”, JCM, vol. 24, no. 2, pp. 157–168, Apr. 2006, Accessed: Dec. 05, 2025. [Online]. Available: https://www.global-sci.com/index.php/JCM/article/view/11753