The Story of The Adidas and Puma Rivalry (The Shoe War) - YouTube
Why Puma and Adidas Became Bitter Rivals
How Adidas & Puma Started From A Feud Between Two Brothers | by Hustle Over Everything | Medium
Puma and Adidas: the brothers who hated each other
Two Brothers, Two Sneakers, And A Global Battle For Footwear | Sports History Weekly
The Famous Family Feud That Spawned Adidas and Puma | HowStuffWorks
Amazon.com: 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
How A Family Feud Led To The Creation Of Puma And Adidas | Celebrity Net Worth