Catholic Encyclopedia
St. Anschar, also called Ansgarius and "the Apostle of the North", Benedictine monk, missionary to Scandinavia, bishop of Hamburg, d. 865.
James Kiefer's Christian Biographies
St. Anskar, bishop and missionary to Denmark and Sweden. With prayer in traditional and contemporary language.
Rembert: The Life of Anskar
St. Rembert's biography of his predecessor St. Anskar. Charles Robinson translation. Includes introduction, bibliography, and hymns.
The Ecole Glossary
Brief biography of St. Anskar, by Karen Rae Keck.