| The UEFA Europa League evolved from the UEFA Cup, which itself was conceived by Switzerland's Ernst Thommen, along with Italy's Ottorino Barrasi and England's Sir Stanley Rous | Magnani, Loris; Stokkermans, Karel 30 April 2005 |
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| One of the final changes takes place in 2006, when the crest accrediting Real Madrid as the best Club of the 20th Century is added to the right side of the shirt | Dongfeng Liu, Girish Ramchandani 2012 |
Union of European Football Associations UEFA.
| El Macca: Four Years with Real Madrid | "The Global Economics of Sport" |
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| London: Guardian News and Media |