Y. Bai, B. Mao, F. Zhou, Y. Ding and C. Dong,Energy-ecient driving strategy for freight trains based on power consumption analysis, Journal of Transportation Systems Engineering and Information Technology,9(3) (2009), 43-50.
 E. Castillo, I. Gallego, J. M. Urena and J. M. Coronado,Timetabling optimization of a single railway track line with sensitivity analysis, Top, 17(2) (2009), 256-287.
 C. S. Chang and S. Sim,Optimising train movements through coast control using genetic algorithms, IEE Proceedings-Electric Power Applications, 144(1) (1997), 65-73.
 S. Eati and H. Roohparvar,The minimization of the fuel costs in the train transportation,Applied Mathematics and Computation,175 (2006), 1415-1431.
 K. Ghoseiri, F. Szidarovszky and M. J. Asgharpour,Amulti-objective train scheduling model and solution, Transportation Research Part B, 38 (2004), 927-952.
 P. Howlett,The optimal control of a train, Annals of Operations Research, 98 (2000), 65-87.
 P. Howlett, P. Pudney and X. Vu,Local energy minimization in optimal train control, Au-tomatica,45(11)(2009), 2692-2698.
 K. B. Khan and X. S. Zhou,Stochastic optimization model and solution algorithm for ro-bust double-track train-timetabling problem, IEEE Transactions on Intelligent Transportation Systems,11(1)(2010), 81-89.
 E. Khmelnitsky,On an optimal control problem of train operation, IEEE Transactions on Automatic Control,45(7) (2000), 1257-1266.
 D. R. Kraay, P. T. Harker and B. Chen,Optimal pacing of trains in freight railroads: model formulation and solution, Operations Research, 39 (1991), 82-99.
 X. Li and B. Liu,A sucient and necessary condition for credibility measure, Internationa Journal of Uncertainty, Fuzziness & Knowledge-Based Systems,14(5) (2006), 527-535.
 P. Li and B. Liu,Entropy of credibility distributions for fuzzy variables, IEEE Transactions on Fuzzy Systems,16(1) (2008), 123-129.
 B. Liu and Y. Liu,Expected value of fuzzy variable and fuzzy expected value models, IEEETransactions on Fuzzy Systems,10(4) (2002), 445-450.
 R. Liu and I. M. Golovitcher,Energy-ecient operation of rail vehicles, Transportation Research Part A,37(2003), 917-932.
 M. Miyatake and H. Ko,Optimization of train speed pro le for minimum energy consumption,IEEJ Transactions on Electrical and Electronic Engineering,5 (2010), 263-269.
 L. Yang, K. P. Li and Z. Y. Gao,Train timetable problem on a single-line railway with fuzzy passenger demand, IEEE Transactions on Fuzzy Systems, 17(3)(2009), 617-629.
 L. Yang, Z. Y. Gao and K. P. Li,Passenger train scheduling on a single-track or partially double-track railway with stochastic information, Engineering Optimization, 42(11) (2010),1003-1022.