YSL Successfully Challenges Louboutin's Trademarked Red Soles

Louboutin have the color red and Burberry its checks - These are the only luxury brands who have successfully replaced their logos with colors and signage - Luxurylaunches

Second Circuit Digs Its Heels Into Louboutin Dispute; Finds Red Sole Trademark Protectable, But Limited in Scope

YSL Successfully Challenges Louboutin's Trademarked Red Soles

YSL drops 18-month lawsuit against Christian Louboutin as both sides claim they won battle of the red-soled shoes

Christian Louboutin vs. YSL 'Red Soles' Lawsuit Finally Dismissed

Frozen 2 versus Christian Louboutin: could Anna's red-soled shoes lead to a trademark dispute? - World Trademark Review

Trademark issue: Red sole(ly) for Louboutin? LexDellmeier – Markenanwalt, Designanwalt München - Schutzrechte Marken, Designs, Patente, Gebrauchsmuster, Urheberrechte - Mark

Look-For Louboutin Kick-in-the-Pants Shoes?

Louboutin v. YSL Red Sole Shoe Trademark Infringement