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://gsp.tricubic.dev/JCM/article/view/11346. Acesso em: 15 mar. 2026.