Al Hadi Ahmed, Hassan Abid. “Some Properties of F Max. O. S. and F. Min. O. S. In Fuzzy Topological Spaces Defined on a Fuzzy Set”. Asian Journal of Current Engineering and Maths, vol. 6, no. 1, Feb. 2017, pp. 17-20, doi:10.15520/ajcem.2017.vol6.iss1.73.pp.