 Don Rosa has also used the terms Barks Universe and Italian Duck Universe to describe different versions of the world's continuity.The terms "Barksian" or "Barksian facts" has also been used to describe the canon of the Donald Duck universe, as many comic book creators and fans only consider the stories by Carl Barks as factual, since he is the creator of many of its major characters, locations and ideas.Don Rosa is an example of this when creating his comic book series "The Life and Times of Scrooge McDuck", with most of his stories being based on the works by Barks.