1. Neutrosophic set- A generalisation of the intuitionistic fuzzy sets;Smarandache;International Journal of Pure and Applied Mathematics,2005
2. Fuzzy set;Zadeh;Information and Control,1965
3. Intuitionistic fuzzy sets;Atanassov;Fuzzy Sets and Systems,1986
4. Smarandache F. and Neutrosophic Neutrosophy. , Probability, Set, and Logic, American Research Press, Rehoboth, USA, 1998.
5. Single valued neutrosophic sets;Wang;Multispace and Multistructure,2010