Andrén, Anders (1989). “State and Towns in the Middle Ages: The Scandinavian Experience”. Theory and Society (New York, Heidelberg, Dordrecht: Springer) 18 (5): 585–609. doi:10.1007/BF00149493. JSTOR657612.
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Central Committee, British Archaeological Association; Central Committee, Archaeological Institute of Great Britain Ireland; Council, Royal Archaeological Institute of Great Britain Ireland; Ireland, Royal Archaeological Institute of Great Britain and; Britain), Royal Archaeological Institute (Great (1866). The Archeological Journal23. London.
Andrén, Anders (1989). “State and Towns in the Middle Ages: The Scandinavian Experience”. Theory and Society (New York, Heidelberg, Dordrecht: Springer) 18 (5): 585–609. doi:10.1007/BF00149493. JSTOR657612.
Reynolds, Susan (1985). What Do We Mean by "Anglo-Saxon" and "Anglo-Saxons"?. The Journal of British Studies 24. Chicago: University of Chicago Press. JSTOR175473.