ROCKAFELLAR, Ralph Tyrrell. Metric regularity properties of monotone mappings. Serdica Mathematical Journal, Sofia, Bulgaria, v. 49, n. 1–3, p. 1–8, 2023. DOI: 10.55630/serdica.2023.49.1-8. Disponível em: https://serdica.math.bas.bg/index.php/serdica/article/view/32. Acesso em: 25 oct. 2026.