Caldas, Miguel, y Saeid Jafari. Remarks on Strongly Precloseds Functions in Topological Space. Pro Mathematica 23, no. 45-46 (septiembre 7, 2009): 147-154. Accedido julio 17, 2024. https://revistas.pucp.edu.pe/index.php/promathematica/article/view/10269.