\bibitem{Atanassov:IFS}
K. T. Atanassov, {\it Intuitionistic fuzzy sets}, Springer-Verlag,
Heidelberg, Germany, 1999.
\bibitem{Burillo:Sdoifn}
P. Burillo, H. Bustince and V. Mohedano,{\it Some definitions of intuitionistic fuzzy number, first properties}, In Proceedings of the 1st Workshop on Fuzzy Based Expert Systems, D. Lakov, (1994), 53-55.
\bibitem{Delgado:Ocrfn}
M. Delgado, M. A Vila and W. Voxman, {\it On a canonical representation of fuzzy numbers}, Fuzzy Sets and Systems, \textbf{93} (1998), 125-135.
\bibitem{Dubey:Lpwtifn}
D. Dubey and A. Mehra, {\it Linear programming with triangular intuitionistic fuzzy number}, EUSFLAT-LFA, (2011), 563-569.
\bibitem{Dubois:Fss}
D. Dubois and H. Prade, {\it Fuzzy sets and systems: theory and
applications}, Academic
Press, Berlin, Germany, 1980.
\bibitem{Grzegorzewski:Dofifn}
P. Grzegorzewski, {\it Distances and orderings in a family of intuitionistic fuzzy numbers}, In Proceedings of the 3rd Conference of the European Society for Fuzzy Logic and Technology (EUSFLAT '03), Zittau, Germany, September, (2003), 223-227.
\bibitem{Guha:Tddmifn}
D. Guha and D. Chakraborty, {\it A theoretical development of distance measure for intuitionistic fuzzy numbers}, International Journal of Mathematics and Mathematical Sciences, to appear.
\bibitem{Li:Rmtifn}
D. F. Li, {\it A ratio ranking method of triangular intuitionistic fuzzy numbers and its application to MADM problems}, Computers and Mathematics with Applications, \textbf{60} (2010), 1557-1570.
\bibitem{Li:Crmfma}
D. F. Li, {\it Compromise ratio method for fuzzy multi-attribute group decision making}, Applied Soft Computing, \textbf{7} (2007), 807-817.
\bibitem{Li:Nmfmgdm}
D. F. Li, {\it A new methodology for fuzzy multi-attribute group decision making with multi-granularity and non-homogeneous information}, Fuzzy Optimization and Decision Making, \textbf{9} (2010), 83-103.
\bibitem{Li:Rmtifn}
D. F. Li, J. X. Nan and M. J. Zhang, {\it A ranking method of triangular intuitionistic fuzzy numbers and Aaplication to decision making}, International Journal of Computational Intelligence Systems, {\bf 3}\textbf{(4)} (2010), 522-530.
\bibitem{Mahapatra:Reutifnao}
G. S. Mahapatra, and T. K. Roy, {\it Reliability evaluation using triangular intuitionistic fuzzy numbers arithmetic operations}, International Journal of Computational and Mathematical Sciences, {\bf 3}\textbf{(5)} (2009), 225-232.
\bibitem{Mitchell:Rifn}
H. B. Mitchell, {\it Ranking intuitionistic fuzzy numbers},
International Journal of Uncertainty, Fuzziness and Knowledge Based Systems, \textbf{12} (2004), 377-386.
\bibitem{Nan:Lmmgp}
J. X. Nan, D. F. Li and M. J. Zhang, {\it A lexicographic method for matrix games with payoffs of triangular intuitionistic fuzzy numbers}, International Journal of Computational Intelligence Systems, {\bf 3}\textbf{(3)} (2010), 280-289.
\bibitem{Nayagam:Rifn}
V. G. Nayagam, G. Venkateshwari and G. Sivaraman, {\it Ranking of intuitionistic fuzzy numbers}, IEEE International Conference on Fuzzy Systems, (2008), 1971-1974.
\bibitem{Nehi:Nrmifn}
H. M. Nehi, {\it A new ranking method for intuitionistic fuzzy numbers}, International Journal of Fuzzy Systems, {\bf 12}\textbf{(1)} (2010), 80-86.
\bibitem{Pasha:Pfnta}
E. Pasha, A. Saiedifar and B. Asady, {\it The percentiles of fuzzy numbers and their applications}, Iranian Journal of Fuzzy Systems, {\bf 6}\textbf{(1)} (2009), 27-44.
\bibitem{Pedrycz:Fse}
W. Pedrycz and F. Gomide. {\it Fuzzy systems engineering: toward human-centric computing}. \ New York: John Wiley and Sons, 2007.
\bibitem{Shu:Uifs}
M. H. Shu, C. H. Cheng and J. R. Chang, {\it Using intuitionistic fuzzy sets for fault-tree analysis on printed circuit board assembly}, Microelectronics Reliability, \textbf{46} (2006), 2139-2148.
\bibitem{Wang:Mdmm}
J. Q. Wang and Z. Zhang, {\it Multi-criteria decision-making method with incomplete certain information based on intuitionistic fuzzy number}, Control and Decision, (in Chinese),
\textbf{24} (2009), 226-230 .
\bibitem{Wang:Aoitfn}
J. Q. Wang and Z. Zhang, {\it Aggregation operators on intuitionistic trapezoidal fuzzy number and its application to multi-criteria decision making problems}, Journal of Systems Engineering and Electronics, {\bf 20}\textbf{(2)} (2009), 321-326.
\bibitem{Yager:Saifs}
R. R. Yager, {\it Some aspects of intuitionistic fuzzy sets}, Fuzzy Optimization and Decision Making, \textbf{8} (2009), 67-90.