EL-Maghrabi, A.I., and F.M. AL-Rehli. “On α-Generalized-δ-Closed Mappings”. Journal of Global Research in Mathematical Archives(JGRMA) 1, no. 1 (February 3, 2013): 1–9. Accessed May 10, 2025. https://www.jgrma.com/index.php/jgrma/article/view/11.