1. Intuitionistic fuzzy sets;K T Atanassov;Fuzzy Sets System,1986
2. Picture fuzzy sets -a new concept for computational intelligence problems;B C Cuong;Third World Congress on Information and Communication Technologies (WICT 2013),2013
3. Rough fuzzy sets and fuzzy rough sets;D Dubois;International Journal of General Systems,1990
4. Research on Uncertainty in Granular Computing;H B Fang;Chinese),2006