References
- http://howto.cnet.com/8301-11310_39-57572909-285/foursquare-speeds-up-check-in-process-in-iphone-app/
- http://www.networkworld.com/slideshows/2011/070511-social-networking.html#slide4
- https://foursquare.com/
- https://foursquare.com/
- http://techcrunch.com/2013/03/06/the-checkin-is-dead-long-live-the-checkin-as-foursquare-adds-quick-glide-feature-on-ios/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29
- http://www.youtube.com/user/foursquareHQ
Interviews
- Jonathan King
- Charles Frye
