Regularity of Positive Solutions for an Integral System on Heisenberg Group. Journal of Mathematical Study, [S. l.], v. 47, n. 2, p. 208–220, 2014. DOI: 10.4208/jms.v47n2.14.05. Disponível em: https://www.global-sci.com/index.php/jms/article/view/13222. Acesso em: 5 dec. 2025.