Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
ABD EL-MONSEF M. E.,β-open sets and β-continuous mappings,Bull. Fac. Sci. Assiut Univ.,,,1983,12,,77-90,https://cir.nii.ac.jp/crid/1574231875959232384,