Catholic Encyclopedia: Christina Alexandra: Biographical article by P. Wittman.
Columbia Encyclopedia: Christina: Concise article on the Swedish queen, from the 2001 edition of this reference work.
FOLDOC: Kristina Wasa: Short article from the philosophical database.
Great Voyages: Kristina Wasa, Queen of Sweden: A quote and biographical timeline of this scholarly monarch.
Philosophers: Christina of Sweden: Very short biography.
Queen Christina of Sweden: A detailed illustrated biography, including commentary on the movie.
Sweden.se: Queen Christina: An official factsheet on this famously independent woman.
Swedish History: Queen Kristina: Two articles focusing on her role as a ruler.
Wikipedia: Christina of Sweden: Entry from this openly-edited encyclopedia.