Louboutin defends red-sole trademark
Trademark protection of color: Louboutin's red-soled shoe is a clever logo
Court Rules Louboutin Can Enforce a Trademark on Its Red Outsoles - The New York Times
Louboutin Gets Injunction in Red Sole Trademark Registration Bid
Could Christian Louboutin's Red Sole Trademark Be Invalid?, British Vogue
Christian Louboutin scrambles to trademark his red-soled shoes
Christian Louboutin CAN trademark signature red soles after winning appeal (unless the shoe itself is the same colour)
Christian Louboutin is brought to heel - Asia Times
Seeing Red: Can a Brand Trademark a Signature Color? - Knowledge at Wharton