1. L. Abdullah, W.K.W. Ismail, Hamming distance in intuitionistic fuzzy sets and interval valued intuitionistic fuzzy sets: a comparative analysis. Adv. Comput. Math. Its Appl. 1(1), 7–11 (2012)
2. A.K. Adak, M. Bhowmik, Interval cut-set of interval-valued intuitionistic fuzzy sets. Afr. J. Math. Comput. Sci. Res. 4(4), 192–200 (2011)
3. J.Y. Ahn, K.S. Han, S.Y. Oh, C.D. Lee, An application of interval-valued intuitionistic fuzzy sets for medical diagnosis of headache. Int. J. Innov. Comput., Inf. Control 7(5B), 2755–2762 (2011)
4. M. Akram, W. Dudek, Interval-valued intuitionistic fuzzy Lie ideals of Lie algebras. World Appl. Sci. J. 7(7), 812–819 (2009)
5. K. Atanassov, Review and new results on intuitonistic fuzzy sets. Preprint IM-MFAIS-1-88, Sofia (1988)