[1]    J. Aisbett, J. T. Rickard and D. Morgenthaler, Multivariate modeling and type-2 fuzzy sets, Fuzzy Sets and Systems 163(1) (2011), 78-95.

[2]    T.-Y. Chen, Signed distanced-based TOPSIS method for multiple criteria decision analysis based on generalized interval-valued fuzzy numbers, International Journal of Information Technology and Decision Making 10(6) (2011), 1131-1159.

[3]    T.-Y. Chen and J.-C. Wang, An interactive procedure for interval type-2 fuzzy decision making with incomplete information and applications to site selection, Advances in Fuzzy Sets and Systems 12(1) (2012), 17-48.

[4]    H. W. Lu, G. H. Huang and L. He, Development of an interval-valued fuzzy linear -programming method based on infinite a-cuts for water resources management, Environmental Modelling and Software 25(3) (2010), 354-361.

[5]    J. M. Mendel, Type-2 fuzzy sets and systems: an overview, IEEE Computational Intelligence Magazine 2(1) (2007), 20-29.

[6]    D. G. Park, Y. C. Kwun, J. H. Park and I. Y. Park, Correlation coefficient of interval-valued intuitionistic fuzzy sets and its application to multiple attribute group decision making problems, Math. Comput. Modelling 50(9-10) (2009), 1279-1293.

[7]    R. Sambuc, Fonctions F-Floues, Application a l’aide au Diagnostic en Pathologie Thyroidienne, These de Doctorat en Medicine, University of Marseille, France, 1975.

[8]    J.-C. Wang and T.-Y. Chen, A closeness coefficient-based multiple criteria decision-making method using interval type-2 fuzzy sets and its application to watershed site selection, Journal of Industrial and Production Engineering 31(1) (2014), 1-16.

[9]    G. Wang and X. Li, The applications of interval-valued fuzzy numbers and interval-distribution numbers, Fuzzy Sets and Systems 98(3) (1998), 331-335.

[10]    W. Wang, X. Liu and Y. Qin, Multi-attribute group decision making models under interval type-2 fuzzy environment, Knowledge-based Systems 30 (2012), 121-128.

[11]    G.-W. Wei, H.-J. Wang and R. Lin, Application of correlation coefficient to interval-valued intuitionistic fuzzy multiple attribute decision-making with incomplete weight information, Knowledge and Information Systems 26(2) (2009), 337-349.

[12]    D. Wu and J. M. Mendel, Uncertainty measures for interval type-2 fuzzy sets, Inform. Sci. 177(23) (2007), 5378-5393.

[13]    Z. Xu, An overview of methods for determining OWA weights, International Journal of Intelligent Systems 20(8) (2005), 843-865.

[14]    L. A. Zadeh, The concept of a linguistic variable and its application to approximate reasoning-I, Inform. Sci. 8(3) (1975), 199-249.

[15]    Z. Zhang and S. Zhang, A novel approach to multi attribute group decision making based on trapezoidal interval type-2 fuzzy soft sets, Applied Mathematical Modelling 37(7) (2013), 4948-4971.