A Posteriori Error Estimate of Optimal Control Problem of PDE with Integral Constraint for State. Journal of Computational Mathematics, [S. l.], v. 27, n. 4, p. 525–542, 2009. DOI: 10.4208/jcm.2009.27.4.017. Disponível em: https://global-sci.com/index.php/JCM/article/view/11950. Acesso em: 5 dec. 2025.