The Bike-sharing Blog: 2008
Pedal powered generator - Appropedia, the sustainability wiki
List of bicycle-sharing systems - Wikipedia
Washington, D.C. - Wikipedia
List of bicycle-sharing systems - Wikipedia
List of bicycle-sharing systems - Wikipedia
Capital Bikeshare – Wikipedia
List of bicycle-sharing systems - Wikipedia
Styr & Ställ - Wikiwand
Washington, D.C. - Wikipedia
List of bicycle-sharing systems - Wikipedia