Watch Adidas Vs. Puma: The Brother's Feud | Prime Video
Why Puma and Adidas Became Bitter Rivals
Lex: Puma/Adidas-Salomon | Financial Times
Watch Adidas Vs. Puma: The Brother's Feud | Prime Video
Sneaker Wars: The Enemy Brothers Who Founded Adidas and Puma and the Family Feud That Forever Changed the Business of Sports: Smit, Barbara: Amazon.com: Books