Sneaker Wars: The Enemy Brothers Who Founded Adidas and Puma and the Family Feud That Forever Changed the Business of Sports: 9780061246586: Smit, Barbara: Books - Amazon.com
Adidas vs Puma: The Story of the Adidas And Puma Brothers
The Fascinating Family Feud that Led to Adidas and Puma, and Allowed Nike to Dominate the Market
How Adidas & Puma Started From A Feud Between Two Brothers | by Hustle Over Everything | Medium
The Puma shoe that upended the 1968 Olympics and threatened Adidas - Sports Illustrated
The Famous Family Feud That Spawned Adidas and Puma | HowStuffWorks