On the Convergence of Nonconforming Finite Element Methods for the 2nd Order Elliptic Problem with the Lowest Regularity. Journal of Computational Mathematics, [S. l.], v. 17, n. 6, p. 609–614, 2021. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/11346. Acesso em: 6 dec. 2025.