Why do Louboutin high heels have red bottoms? - Quora
Louboutin defends red-sole trademark
Designer Louboutin wins case on red soled high-heels
In the battle over his sole, Louboutin loses a round
Christian Louboutin on Cardi B and His 'Red Bottoms' - The New
Christian Louboutin's Red Sole – Is it Solely a Shape Mark?
Yves Saint Laurent defends its red soles - Times of India
The Fight for Red: Fashion Statement or Protected Trademark
Louboutin could lose red-sole monopoly