A New Preconditioning Strategy for Solving a Class of Time-Dependent PDE-Constrained Optimization Problems. Journal of Computational Mathematics, [S. l.], v. 32, n. 3, p. 215–232, 2018. DOI: 10.4208/jcm.1401-CR3. Disponível em: https://www.global-sci.com/index.php/JCM/article/view/12152. Acesso em: 6 dec. 2025.