On the $P_1$ Powell-Sabin Divergence-Free Finite Element for the Stokes Equations. Journal of Computational Mathematics, [S. l.], v. 26, n. 3, p. 456–470, 2018. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/11893. Acesso em: 5 dec. 2025.