Claudia Rosenbaum, «California Graphic Artist Claims He, Not Kurt Cobain, Created Nirvana's Smiley Face Logo», Billboard, (lire en ligne[archive du ], consulté le )
«Smith v. Wal-Mart Stores, Inc.» [archive du ], Citizen Vox, (consulté le ) The relevant text is in the Order granting summary judgment: Timothy C. Batten Sr., "ORDER" (21 March 2008)", section "B. Threshold Issue: Trademark Ownership", case "1:06-cv-00526-TCB", document 103, pages 15–19
(en-US) Jacob Gallagher, «The Shockingly Large Business Behind the Iconic Smiley Face», Wall Street Journal, (ISSN0099-9660, lire en ligne, consulté le )
(en-GB) «SmileyWorld’s CEO Nicolas Loufrani on plagiarism, the school market and a push for more toys - Licensing.biz», Licensing.biz, (lire en ligne[archive du ], consulté le )
(en-GB) «SmileyWorld’s CEO Nicolas Loufrani on plagiarism, the school market and a push for more toys - Licensing.biz», Licensing.biz, (lire en ligne[archive du ], consulté le )
Richard Williamson, «The last days of Walmart's smiley face», Adweek, (lire en ligne[archive du ], consulté le )
«Smith v. Wal-Mart Stores, Inc.» [archive du ], Citizen Vox, (consulté le ) The relevant text is in the Order granting summary judgment: Timothy C. Batten Sr., "ORDER" (21 March 2008)", section "B. Threshold Issue: Trademark Ownership", case "1:06-cv-00526-TCB", document 103, pages 15–19
Claudia Rosenbaum, «California Graphic Artist Claims He, Not Kurt Cobain, Created Nirvana's Smiley Face Logo», Billboard, (lire en ligne[archive du ], consulté le )
(en-US) Jacob Gallagher, «The Shockingly Large Business Behind the Iconic Smiley Face», Wall Street Journal, (ISSN0099-9660, lire en ligne, consulté le )