more..
off site links
An article on this here.
American Brittany magazine reprint on Brittany coat colour
a similar article by Pierre Willems , also here - the source for the article above.
an extensive article on coat colours but not brittany specific.
A good collection of related coat colour articles
some software to sort it all out - no mention of EB though - you can download a trial to play with.
a very extensive list of inheritance related articles - a list of Brittany specific disorders (be aware this is an American site)