\bibitem{AbAl:AMSFLS} S. Abbasbandy and M. Alavi, {\it A method for solving fuzzy linear
systems}, Iranian Journal of Fuzzy Systems, {\bf 2}\textbf{(2)} (2005), 37-44.
\bibitem{AbMa:pcPFNRC} S. M. Abu Nayeem and M. Pal, {\it The p-center problem on fuzzy
networks and reduction of cost}, Iranian Journal of Fuzzy Systems,
{\bf 5}\textbf{(1)} (2008), 1-26.
\bibitem{ArTa:EPFLRM} A. R. Arabpour and M. Tata, {\it Estimating the parameters of a fuzzy linear
regression model}, Iranian Journal of Fuzzy Systems, {\bf 5}\textbf{(2)} (2008), 1-19.
\bibitem{BaJaSh:LPandNF} M. S. Bazaraa, J. J. Jarvis and H. D. Sherali, {\it Linear
programming and network flows}, Jhon Wiley and Sons, New York, 1990.
\bibitem{CaVe:APFOMM} J. M. Cadenas and J. L. Verdegay, {\it A primer on fuzzy optimization models
and methods}, Iranian Journal of Fuzzy Systems, {\bf 3}\textbf{(1)} (2006), 1-22.
\bibitem{Celmins:LSMFFVD} A. Celmins, {\it Least squares model fitting to fuzzy vector
data}, Fuzzy Sets and Systems, {\bf 22} (1987), 245-269.
\bibitem{ChBa:FRLADE} S. H. Choi and J. J. Buckley, {\it Fuzzy regression using least
absolute deviation estimators}, Soft Computing, {\bf 12}\textbf{(3)} (2008), 257-263.
\bibitem{ChKiPa:NRQE} S. H. Choi, H. K. Kim and K. O. Park, {\it Nonlinear regression quantiles estimation}, Journal of the Korean Statistical Society, {\bf 29} (2000), 187-199.
\bibitem{CDuGiSa:LSELRMFR} R. Coppi, P. D'Urso, P. Giordani and A. Santoro,
{\it Least squares estimation of a linear regression model with LR fuzzy response},
Computational Statistics \& Data Analysis, {\bf 51} (2006), 267-286.
\bibitem{Diam:FLS} P. Diamond, {\it Fuzzy least squares}, Information Sciences,
{\bf 46} (1988), 141-157.
\bibitem{Diam:LSFSV} P. Diamond, {\it Least squares fitting of several variables},
Preprint of Second IFSA Congress, Tokyo, July (1987), 20-25.
\bibitem{DiKl:MSFS} P. Diamond and P. Kloeden, {\it Metrics spaces of fuzzy sets:
theory and applications}, World Scientific, 1994.
\bibitem{D'Urso:LRFCIFCOD} P. D'Urso, {\it Linear regression analysis for fuzzy/crisp input and fuzzy/crisp
output data}, Computational Statistics \& Data Analysis, {\bf 42} (2003), 47-72.
\bibitem{HaMaYa:AGPAFLR} H. Hassanpour, H. R. Maleki and M. A. Yaghoobi, {\it A goal programming
approach to fuzzy linear regression with non-fuzzy input and fuzzy
output data}, APJOR, {\bf 26}\textbf{(5)} (2009), 587-604.
\bibitem{HaMaYa:ANEFLRMCMF} H. Hassanpour, H. R. Maleki and M. A. Yaghoobi, {\it A note on evaluation
of fuzzy linear regression models by comparing membership functions}, Iranian Journal of Fuzzy Systems, {\bf 6}\textbf{(2)} (2009), 1-6.
\bibitem{HoBeSm:ASMCFLR} M. Hojati, C. R. Bector and K. Smimou, {\it A simple method for computation
of fuzzy linear regression}, EJOR, {\bf 166} (2005), 172-184.
\bibitem{HuYa:AOADOFRM} W. L. Hung and M. S. Yang, {\it An omission approach for detecting outliers in
fuzzy regression models}, Fuzzy Sets and Systems, {\bf 157} (2006), 3109-3122.
\bibitem{JOZ:OELDTPFLR} S. Jozsef, {\it On the effect of linear data transformations in
possibilistic fuzzy linear regression}, Fuzzy Sets and Systems,
{\bf 45} (1992), 185-188.
\bibitem{KaCh:AFLRMBEP} C. Kao and C. L. Chyu, {\it A fuzzy linear regression model with better
explanatory power}, Fuzzy Sets and Systems, {\bf 126} (2002), 401-409.
\bibitem{KaCh:LSEFRA} C. Kao and C. L. Chyu, {\it Least-squares
estimates in fuzzy regression analysis}, EJOR, {\bf 148} (2003), 426-435.
\bibitem{KiBi:EFLRMCMF} B. Kim and R. R. Bishu, {\it Evaluation of fuzzy linear regression models by
comparing membership functions}, Fuzzy Sets and Systems, {\bf 100} (1998), 343-352.
\bibitem{KiYoLi:APLSEFO} H. K. Kim, J. H. Yoon and Y. Li, {\it Asymptotic properties of least squares
estimation with fuzzy observations}, Information Sciences,
{\bf 178} (2008), 439-451.
\bibitem{KoBa} R. Koenker and G. Bassett, {\it Regression quantiles}, Econometrica,
{\bf 46} (1978), 33-50.
\bibitem{LINGO} L. Schage, {\it LINGO release 6.0}, LINDO System, Inc., 1999.
\bibitem{MATLAB} {\it MATLAB 7.0}, The Mathworks, (www.mathworks.com).
\bibitem{MPL} Maximal software inc., (www.maximalsoftware.com).
\bibitem{MiFrKa:GFLS} M. Ming, M. Friedman and A. Kandel, {\it General
fuzzy least-squares}, Fuzzy Sets and Systems, {\bf 88} (1997), 107-118.
\bibitem{MoNaNa:FLRAPVR} M. Modarres, E. Nasrabadi and M. M. Nasrabadi, {\it Fuzzy linear regression
analysis from the point of view risk}, International Journal of Uncertainty,
Fuzziness and Knowledge-Based Systems, {\bf 12}\textbf{(5)} (2004), 635-649.
\bibitem{MoNaNa:FLRMLSE} M. Modarres, E. Nasrabadi and M. M. Nasrabadi, {\it Fuzzy linear regression models with least square errors}, Applied Mathematics and Computation, {\bf 163} (2005), 977-989.
\bibitem{MoTa:PFFLSR} J. Mohammadi and S. M. Taheri, {\it Pedomodels fitting with fuzzy least
squares regression}, Iranian Journal of Fuzzy Systems, {\bf 1}\textbf{(29)} (2004), 45-62.
\bibitem{OzDu:MOFRGF} E. C. \"{O}zelkan and L. Duckstein, {\it Multi-objective fuzzy regression:
a general framework}, Computers \& Operations Research, {\bf 27} (2000), 635-652.
\bibitem{Pet:FLRFI} G. Peters, {\it Fuzzy linear regression with fuzzy
intervals}, Fuzzy Sets and Systems, {\bf 63} (1994), 45-55.
\bibitem{ReWo:PCFLRM} D. T. Redden and W. H. Woodall, {\it Properties of certain fuzzy linear
regression models}, Fuzzy Sets and Systems, {\bf 64} (1994), 361-375.
\bibitem{SaMaZa:AnZMSFLPp} M. R. Safi, H. R. Maleki and E. Zaeimazad, {\it A note on zimmermann
method for solving fuzzy linear programming problems}, Iranian Journal of
Fuzzy Systems, {\bf 4}\textbf{(2)} (2007), 31-46.
\bibitem{Sak:FSIMO} M. Sakawa, {\it Fuzzy sets and interactive multiobjective optimization},
Plenum Press, New York, 1993.
\bibitem{SaYa:FLRA} M. Sakawa and H. Yano, {\it Fuzzy linear regression and its applications}, In:
Studies in Fuzziness, Fuzzy Regression Analysis,
J. Kacprzyk and M. Fedrizzi, Omnitech Press, Warsaw,
Poland, {\bf1} (1992), 61-80.
\bibitem{SaYa:MFLRAFIOD} M. Sakawa and H. Yano, {\it Multiobjective fuzzy linear
regression analysis for fuzzy input-output data}, Fuzzy Sets and
Systems, {\bf 47} (1992), 173-181.
\bibitem{SaPe:EFLRM} D. A. Savic and W. Pedrycz, {\it Evaluation of fuzzy linear
regression models}, Fuzzy Sets and Systems, {\bf 39} (1991), 51-63.
\bibitem{ShKhGh:OLOFSFRICMC} E. Shivanian, E. Khorram and A. Ghodousian, {\it Optimization of linear
objective function subject to fuzzy relation inequalities constraints with max-average composition}, Iranian Journal of Fuzzy Systems, {\bf 4}\textbf{(2)} (2007), 15-30.
\bibitem{Tan:FDAPLM} H. Tanaka, {\it Fuzzy data analysis by possibilistic linear models},
Fuzzy Sets and Systems, {\bf 24} (1987), 363-375.
\bibitem{TaHaWa:PLRAFD}H. Tanaka, I. Hayashi and J. Watada, {\it Possibilistic linear
regression analysis for fuzzy data}, EJOR, {\bf 40} (1989), 389-396.
\bibitem{TaUeAs:LRAFM} H. Tanaka, S. Uejima and K. Asai, {\it Linear regression analysis with fuzzy
model}, IEEE Transactions on Systems, Man and Cybernetics,
{\bf 12} (1982), 903-907.
\bibitem{VaKa:tBAFNS} S. M. Vaezpour and F. Karimi, {\it T-best approximation in fuzzy normed
spaces}, Iranian Journal of Fuzzy Systems, {\bf 5}\textbf{(2)} (2008),
93-99.
\bibitem{WaZhMe:FNRLLST} N. Wang, W. X. Zhang and C. L. Mei, {\it Fuzzy nonparametric regression based on local linear smoothing technique}, Information Sciences, {\bf 177} (2007), 3882-3900.
\bibitem{Wu:FERPLRMIIOD} H. C. Wu, {\it Fuzzy estimates of regression parameters in linear regression models for imprecise input and output data}, Computational Statistics \& Data
Analysis, {\bf 42} (2003), 203 - 217.
\bibitem{Wu:FLRMFSP} H. C. Wu, {\it Fuzzy linear regression model based on fuzzy scalar
product}, Soft Computing, {\bf 12} (2008), 469-477.
\bibitem{WuNa:LSFRFRV} A. W\"{u}nsche and W. N\"{a}ther, {\it Least-squares fuzzy regression with fuzzy
random variables}, Fuzzy Sets and Systems, {\bf 130} (2002), 43-50.
\bibitem{XuLi:MLSFFM} R. Xu and C. Li, {\it Multidimensional least-squares fitting with a fuzzy
model}, Fuzzy Sets and Systems, {\bf 119} (2001), 215-223.
\bibitem{YaKo:OCFCCPFD} M. S. Yang and C. H. Ko, {\it On a class of fuzzy c-numbers clustering procedures for fuzzy data}, Fuzzy sets and Systems, {\bf 84} (1996), 49-60.
\bibitem{YaLi:FLSLRAFIOD} M. S. Yang and T. S. Lin, {\it Fuzzy least squares linear regression analysis for fuzzy input-output data}, Fuzzy Sets and Systems, {\bf 126} (2002), 389-399.
\bibitem{YaTa:ASNRBGPFPVP} M. A. Yaghoobi and M. Tamiz, {\it A short note on the relationship between
goal programming and fuzzy programming for vectormaximum problems},
Iranian Journal of Fuzzy Systems, {\bf 2}{\bf (2)} (2005), 31-36.
\bibitem{Za:Fs} L. A. Zadeh, {\it Fuzzy sets}, Information and Control, {\bf 8} (1965),
338-353.
\bibitem{Zadeh:FSBTP} L. A. Zadeh, {\it Fuzzy sets as a basis for a theory of possibility},
Fuzzy Sets and Systems, {\bf 1} (1978), 3-28.