Christian Louboutin and Diane von Furstenberg take on the New York courts - Telegraph
Christian Louboutin's Red Shoe Soles are a valid Trademark.
MAY BE INFRINGING LOUBOUTIN'S RED-SOLE TRADEMARK - Kluwer Trademark Blog
Red soles are Christian Louboutin's trademark - Retail in Asia
Red Soles, High Heels, and a Global Quest for Trademark Rights
Christian Louboutin faces setback in fight to trademark red sole, Luxury goods sector
Can Christian Louboutin Trademark Red Soles? An E.U. Court Says No - The New York Times
Designer Louboutin hits back in red sole lawsuit
Red Bottom Heels: The Trademark Dispute – University of Cincinnati Law Review Blog
Court: Christian Louboutin Red Soles Trademark Invalid