How Birkenstock went from 'ugly' sandal to trendy fashion staple: the popular German LVMH-owned footwear brand elevated its status with Barbie, Kendall Jenner and collaborations with Valentino | South China Morning Post
The secret of Birkenstock's enduring success | CNN
The revealing history of Birkenstock sandals - CBS News
Birkenstock Raises $1.48 Billion in Its I.P.O. - The New York Times
German sandal maker Birkenstock in €4bn takeover battle | Mergers and acquisitions | The Guardian
Birkenstock Brothers Worth $3.4 Billion After Shoemaker's IPO