ALMEIDA PEREIRA, Orlando J. B.; MOITINHO DE ALMEIDA, Jose P. Adaptive refinement for a local error bound based on duality. Computer Assisted Methods in Engineering and Science, [S. l.], v. 10, n. 4, p. 565–574, 2003. Disponível em: https://cames.ippt.gov.pl/index.php/cames/article/view/1065. Acesso em: 5 mar. 2026.