CALDAS, M.; JAFARI, S. A decomposition of $\boldsymbol{\delta}$-open functions. Sarajevo Journal of Mathematics, [S. l.], v. 11, n. 2, p. 267–271, 2024. DOI: 10.5644/SJM.11.2.12. Disponível em: https://sjm.anubih.ba/index.php/sjm/article/view/215. Acesso em: 15 oct. 2024.