1Warren R. H.Fuzzy topologies characterized by neighborhood systems , Rocky Mountain J[].Mathematica Journal.1979
2Chakraborty M. K.Fuzzy topology on fuzzy sets and tolernce topology[].Fuzzy Sets and Systems.1992
3Chang C. L.Fuzzy topological spaces , J[].Journal of Mathematical Analysis and Applications.1968
4Pu Paoming,Liu Yingming.Fuzzy topology I : Neighborhood structure of a fuzzy point and Moccre-Smith convergence, J[].Journal of Mathematical Analysis and Applications.1980
