1. FAMS: towards the agency for flexible mobility services;Ambrosino,2004
2. Key lessons learned from recent experience with flexible transport services;Brake;Transport Policy,2007
3. “US airline outlook: Fundamental restructuring in wind, but will industry revert to type?” Feb. 5, 2010;Center for Asia Pacific Aviation,2010
4. Guidebook for measuring, assessing, and improving performance of demand-response transportation;KFH Group, Inc.,2008
5. Operational experiences with flexible transit services;Koffman,2004