A modified weighted Hausdorff distance between intuitionistic fuzzy sets. - Evgeniy Marinov; Eulalia Szmidt; Janusz Kacprzyk; Radoslav Tsvetkov (IEEE Conf. of Intelligent Systems, 2012)

Short Remark on Fuzzy Sets, Interval Type-2 Fuzzy Sets, General Type-2 Fuzzy Sets and Intuitionistic Fuzzy Sets. - Oscar Castillo 001; Patricia Melin; Radoslav Tsvetkov; Krassimir T. Atanassov (IEEE Conf. on Intelligent Systems (1), 2014)

Intuitionistic Fuzzy Inclusion Indicator of Intuitionistic Fuzzy Sets. - Evgeniy Marinov; Radoslav Tsvetkov; Peter Vassilev (Imprecision and Uncertainty in Information Representation and Processing, 2016)