\bibitem{Ath} {M. Athans and P. L. Falb, \textit{Optimal control: an introduction to the theory and its applications}, New York, McGraw-Hill, Inc.,} 1966.
%\bibitem{Bv} {Brunt B. V., The calculus of variations, Springer-Verlag Heidelberg,} (2004).
\bibitem{BF} {J. J. Buckley and T. Feuring, \textit{Introduction to
fuzzy partial differential equations}, Fuzzy Sets and Systems,} {\bf 105} (1999), 241-248.
%\bibitem{Da} {Dacorogna B., Introduction to the calculus of variations, Imperial College Press,} (2004).
\bibitem{DP} {D. Dubois and H. Prade, \textit{Operation on fuzzy numbers}, Internat. J. Systems Sci.,} {\bf 9} (1978), 613-626.
%\bibitem{Em} {Emamizadeh B., Decreasing rearrangement and a fuzzy variational problem, Applied Math. Letters,} {\bf 18,} (2005), 171-178.
\bibitem{far} {B. Farhadinia, \textit{Necessary optimality conditions for fuzzy variational problems}, Information Sciences,} {\bf 181} (2011), 1348-1357.
\bibitem{GV}{R. Goetschel and W. Voxman, \textit{Elementary fuzzy calculus}, Fuzzy Sets and
Systems,} {\bf 18} (1986), 31-43.
\bibitem{huk} {M. Hukuhara, \textit{Integration des applications measurables dont la valeur est un compact convexe}, Funkcialaj. Ekvacioj,} {\bf 10} (1967), 205-223.
\bibitem{hyu}{C. H. Hyun, C. W. Park and S. Kim, \textit{Takagi-Sugeno fuzzy model based indirect adaptive fuzzy observer
and controller design}, Information Sciences,} {\bf 180} (2010), 2314-2327.
%\bibitem{K} {Kirk D. E., Optimal control theory, an introduction, Dover Publications,} (2004).
\bibitem{Kl} {G. J. Klir and B. Yuan, \textit{Fuzzy sets and fuzzy logic-theory and applications}, Prentice-Hall Inc.,} 1995.
\bibitem{ku}{C. C. Ku, P. H. Huang and W. J. Chang, \textit{Passive fuzzy controller design for nonlinear systems
with multiplicative noises}, J. Franklin Institute,} {\bf 347} (2010), 732-750.
\bibitem{kwu}{Y. C. Kwun, J. S. Kim, M. J. Park and J. H.Park, \textit{Nonlocal controllability for the semilinear fuzzy integrodifferential equations in n-dimensional fuzzy vector space}, Advances in Difference Equations,} doi:10.1155/2009/734090, {\bf 2009}.
\bibitem{liu}{B. Liu, \textit{Fuzzy process, hybrid process and uncertain process}, J. Un-
certain Systems,} {\bf 2} (2008), 3-16.
\bibitem{liu2}{B. Liu, \textit{Uncertainty theory}, 2nd Ed., Springer-Verlag, Berlin,} 2007.
\bibitem{Mo} {B. S. Mordukhovich and L. Wang, \textit{Optimal control of constrained delay-differential
inclusions with multivalued initial conditions}, J. Control Cybernet.,} {\bf 32} (2003), 585-609.
\bibitem{phu} {N. D. Phu and T. T. Tung, \textit{Existence of solutions of fuzzy control differential equations}, J. Science and Technology
Development,} {\bf 10} (2007), 5-12.
\bibitem{tak} {T. Takagi and M. Sugeno, \textit{Fuzzy identification of systems and its applications to modeling and control}, IEEE Trans. on SMC,} {\bf 15} (1985), 116-132.
\bibitem{yan} {D. Yang and K. Y. Cai, \textit{Finite-time quantized guaranteed cost fuzzy control for continuous-time
nonlinear systems}, Expert Systems with Applications,} doi:10.1016/j.eswa.2010.03.024, 2010.
\bibitem{Zd} {L. A. Zadeh, \textit{Fuzzy sets}, Information and Control,} {\bf 8} (1965), 338-353.
)