MOHAMMAD A. A. MARABEH. Topological-like notions via Δ-open sets. Results in Nonlinear Analysis, [S. l.], v. 6, n. 1, p. 12–23, 2023. Disponível em: https://nonlinear-analysis.com/index.php/pub/article/view/144. Acesso em: 3 may. 2024.