Colby - Smooth Coat Collie lab mix by salanderh on DeviantArt
Collie (Rough and Smooth) - Dog Spotters
Smooth Collie - zooplus Magazine
General Information about the Smooth Collie – The Smooth Collie Club of Great Britain
Collie (Smooth) | Breeds A to Z | The Kennel Club
Dog Smooth Collie: traits and pictures
Blue Haven - Did you know the collie comes in two varieties? The smooth coat and the rough coat. They still require grooming, although the smooth coat is a little less cumbersome