Sneaker Wars: The Enemy Brothers Who Founded Adidas and Puma and the Family Feud That Forever Changed the Business of Sport: Smit, Barbara: Amazon.com: Books
Adidas's Yeezy Mess Has Been a Billion-Dollar Nightmare for the Business - Bloomberg
Puma buys Team India kit sponsorship document, Adidas too could enter fray - India Today
Adidas sues Nike over run-tracking, shoe-adjusting technologies | Reuters