1Tamin O Z,Willumsen G.Transport demand mo-del estimation from traffic counts.Transportation,1989,16(1):3-27. 被引量:1
2Leonnie N D,Attahiru S A,Afifi H S.The relia-bility of using the gravity model for forecasting trip distribution.Transportation,1987,14(3):175-193. 被引量:1