Philippa Stockley: What your red-soled stilettos say about you, The Independent
The Secret Science Behind Red Bottom Shoes - Brianne Fleming
Can a Shoe Color Really Be Trademarked?
Red Soles, High Heels, and a Global Quest for Trademark Rights
Trademark protection of color: Louboutin's red-soled shoe is a clever logo
Red hot love for Louboutin shoes – Orange County Register
Louboutin wins YSL battle to trademark red soles
Are Louboutins Appropriate For the Office?
Christian Louboutin Defends Position in Red Sole Case – WWD
Louboutin & the Law: Switzerland Turns Down Red Sole Trademark Request – WWD