@book {Theodoricus1998, title = {An Account of the Ancient History of the Norwegian King}, year = {1998}, pages = {176}, publisher = {Viking society for northern research}, organization = {Viking society for northern research}, address = {London}, url = {http://www.vsnrweb-publications.org.uk/Text\%20Series/Theodoricus.pdf}, author = {Theodoricus, monachus} }