1. Groupon Facts & Figures by Aman Kumra (March 2011)

2. You’re looking at $480M of Groupon’s gross revenue by Paul Butler

3. The Inevitable Rise (and Inevitable Fall?) of Groupon by OnlineMBA (Jan 2011)

4. If Groupon Flipped Their Model, Could It Unleash the Power of Networks? by Emergent by Design (Jan 2011)

5. How Effective are Groupon Promotions for Business by MyCouponCodes (Dec 2010)

6. The Social Buying Universe by Flowtown (Oct 2010)

7. Groupon Revealed: The Pros and Cons by SiteJabber (Oct 2010)

8. The Visual Bible to Daily Deals Services: How Do Daily Deals Sites Work and How Do They Make Profit? by DailyBits

9. Group Couponing: How it Works by Paul Jacobson

10. Where it all began: The History of Coupons by Savings.com
