Error Estimates for Sparse Optimal Control Problems by Piecewise Linear Finite Element Approximation. Journal of Computational Mathematics, [S. l.], v. 39, n. 3, p. 471–492, 2021. DOI: 10.4208/jcm.2003-m2017-0213. Disponível em: https://global-sci.com/index.php/JCM/article/view/12466. Acesso em: 6 dec. 2025.