Board Thread:Warhammer 40k General Discussion/@comment-108.232.141.184-20130309234314/@comment-8881468-20150512105306

I crosschecked Lexicanum,, they got several sources for them
 * 1: How to Paint Space Marines, pg. 88
 * 2: Codex: Space Marines (5th Edition)
 * 2a: pg. 30
 * 2b: pg. 49
 * 3: Imperial Armour Volume Nine - The Badab War - Part One, pg. 100

As for the Space wolves successor link: nothing is given  and is there not, if I remember correctly, one loyal astartes chapter with the "space wolves" wolfshead in purple, which operates in several novels and is intrioduced by the author as "what the lunar wolves should have been"