1. Intuitionistic fuzzy sets;Atanassov,1983
2. Two operators on intuitionistic fuzzy sets;Atanassov;Comptes Rendus Acaémi bulgare Sci.,1988
3. Intuitionistic fuzzy relations;Atanassov,1989
4. Interval valued intuitionistic fuzzy sets;Atanassov;Fuzzy Sets and Systems,1989
5. Intuitionistic fuzzy logic operators of a set theoretical type;Atanassov,1994