9Azadeh A, Ghaderi S F, Izadbakhsh H. Integration of DEA and AHP with computer simulation for railway system improvement and optimization[J]. Applied Mathematics and Computation, 2008, 195(2): 775-785.
10Vaidya O S, Kumar S. Analytic hierarchy process: An overview of applications[J]. European Journal of Operational Research, 2006, 169(1): 1.