6Krykewycz Gregory R,Puchalsky Christopher M, Rocks Joshua.Defining a Primary Market and Estimating Demand for Major Bi-cycle-Sharing Program in Philadelphia, Pennsylvania [J]. Trans-portation Research Record. October,2010: 117-124.
7Kaltenbrunner Andreas, Meza Rodrigo,Grivolla Jens. Urban cy-cles and mobility patterns: Exploring and predicting trends in abicycle-based public transport system [J]. Pervasive and MobileComputing. August.2010:455-466.
8Shaheen Susan, Guzman Stacey,Zhang Hua. Bikesharing in Eu-rope, the Americas, and Asia [J]. Transportation Research Re-cord. January,2010-159-167.
9Fuller Daniel, Gauvin Lise, Kestens Yan. Use of a New PublicBicycle Share Program in Montreal, Canada [J]. American Jour-nal of Preventive Medicine. January ,2011 :80-83.