Khalaf, A. B. ., N. K. . Ahmed, and Q. H. . Hamko. “Soft Separation Axioms and Functions With Soft Closed Graphs”. Proyecciones (Antofagasta, On Line), vol. 41, no. 1, Jan. 2022, pp. 177-95, doi:10.22199/issn.0717-6279-4004.