1. Beyond the Northlands: Viking Voyages and the Old Norse Sagas;Barraclough,2016
2. Vikings: Warriors of No Nation
https://www.historytoday.com/miscellanies/vikings-warriors-no-nation
3. The Vikings Reimagined. Reception, Recovery, Engagement,2019
4. The Twelfth Century Renaissance (Library of European Civilization);Brooke,1969
5. Medieval Iceland: Society, Sagas, and Power;Byock,1988