\bibitem{Bellman and Zadeh}R. E. Bellman and L. A. Zadeh, {\it Decision making in a fuzzy environment},
Management Science, {\bf \textbf{17}} (1970), 141-164.
\bibitem{Delgado}M. Delgado, J. Kacprzyk, J. L. Verdegay and M. A. Vila, {\it Fuzzy optimization: recent advances},
Physica-Verlag, Wurzburg, 1994.
\bibitem{Ji}X. Ji X and Z. Shao, {\it Model and algorithm for bilevel newsboy
problem with fuzzy demands and discounts}, Applied Mathematics and
Computation, {\bf \textbf{172(1)}} (2006), 163-174.
\bibitem{Lai 1}Y. J. Lai and C. L. Hwang, {\it Fuzzy mathematical programming: methods and applications},
Lecture Notes in Economics and Mathematical Systems,
Springer, Berlin, {\bf\textbf{394}} (1992).
\bibitem{Lai 2}Y. J. Lai and C. L. Hwang, {\it Fuzzy multiple objective decision making: methods and applications},
Lecture notes in Economics and Mathematical Systems,
Springer, Berlin, {\bf\textbf{404}} (1992).
\bibitem{Li 2006}X. Li and B. Liu, {\it A sufficient and necessary condition for credibility measures},
International Journal of Uncertainty, Fuzziness \& Knowledge-Based
Systems, {\bf \textbf{14(5)}} (2006), 527-535.
\bibitem{Li and liu}X. Li and B. Liu, {\it The independence of fuzzy variables with
applications}, International Journal of Natural Sciences and
Technology, {\bf \textbf{1(1)}} (2006), 95-100.
\bibitem{Li2010}X. Li, Z. Qin and L. X. Yang, {\it A chance-constrained portfolio selection model with risk
constraints}, Applied Mathematics and Computation, {\bf
\textbf{217}} (2010), 949-951.
\bibitem{Li2011}X. Li, Z. Qin, L. X. Yang and K. P. Li, {\it Entropy maximization model for trip distribution problem with
fuzzy and random parameters}, Journal of Computational and Applied
Mathematics, doi:10.1016/j.cam.2010.09.004.
\bibitem{Liu maximax ccp}B. Liu and K. Iwamura, {\it Chance constrained programming with fuzzy parameters},
Fuzzy Sets and Systems, {\bf \textbf{94(2)}} (1998), 227-237.
\bibitem{Liu minimax ccp}B. Liu, {\it Minimax chance constrained programming models for fuzzy decision systems},
Information Sciences, {\bf \textbf{112(1-4)}} (1998), 25-38.
\bibitem{Liu dcp}B. Liu, {\it Dependent-chance programming in fuzzy environment}, Fuzzy Sets and Systems, {\bf \textbf{109(1)}} (2000), 97-106.
\bibitem{Liu 2002}B. Liu, {\em Theory and practice of uncertain programming}, Physica-Verlag, Heidelberg, 2002.
\bibitem{Liu and Liu Evofv}B. Liu and Y. K. Liu, {\it Expected value of fuzzy variable and fuzzy expected value models},
IEEE Transactions on Fuzzy Systems, {\bf \textbf{10(4)}} (2002),
445-450.
\bibitem{Liu 2004}B. Liu, {\em Uncertainty theory: an introduction to its axiomatic
foundations}, Springer-Verlag, Berlin, 2004.
\bibitem{Liu 2007}B. Liu, {\em Uncertainty theory}, 2nd ed.,
Springer-Verlag, Berlin, 2007.
\bibitem{Liu and Gao independent}Y. K. Liu and J. Gao, {\it The independence of fuzzy variables with applications to fuzzy random
optimization}, International Journal of Uncertainty, Fuzziness \&
Knowledge-Based Systems, {\bf \textbf{15(Suppl.2)}} (2007), 1-20.
\bibitem{peng and liu}J. Peng and B. Liu, {\it Parallel machine scheduling models with fuzzy processing times},
Information Sciences, {\bf \textbf{166(1-4)}} (2004), 49-66.
\bibitem{slowinski}R. Slowinski, {\em Fuzzy sets in decision analysis,
operations research and statistics}, Kluwer Academic Publishers,
Dordrecht, 1998.
\bibitem{vajda}S. Vajda, {\em Probabilistic programming}, Academic Press,
New York, 1972.
\bibitem{Zadeh 1978}L. A. Zadeh, {\it Fuzzy sets as a basis for a theory of possibility}, Fuzzy Sets and
Systems, {\bf \textbf{1}} (1978), 3-28.
\bibitem{Zadeh 1979}L. A. Zadeh, {\it A theory of approximate reasoning}, In: Hayes J et al.,
Mathematical Frontiers of the Social and Policy Sciences, Westview
Press, Boulder, Cororado, (1979), 69-129.
\bibitem{zhao and liu}R. Zhao and B. Liu, {\it Standby redundancy optimization problems with fuzzy lifetimes},
Computers \& Industrial Engineering, {\bf \textbf{149(2)}} (2005),
318-338.
\bibitem{Zheng and Liu}Y. Zheng and B. Liu, {\it Fuzzy vehicle routing model with
credibility measure and its hybrid intelligent algorithm}, Applied
Mathematics and Computation, {\bf \textbf{176(2)}} (2006), 673-683.
\bibitem{Zhou}J. Zhou and B. Liu B, {\it Modeling capacitated location-allocation
problem with fuzzy demands}, Computers \& Industrial Engineering,
{\bf \textbf{53(3)}} (2007), 454-468.
)