Millar, Robert McColl (2014). "Social History and the Sociology of Language". In Hernández-Campoy, Juan M.; Conde-Silvestre, J. Camilo (eds.). The Handbook of Historical Sociolinguistics. Chichester: Wiley Blackwell. p. 57. ISBN978-1118798027. Retrieved 6 June 2014.
Baranauskienė, Rasa (2012). "4.9 Celtic motifs in Hildinavisen"(PDF). Celtic and Scandinavian language and cultural contacts during the Viking Age (Ph. D.). Vilnius University. pp. 164–192. Retrieved 7 June 2015.
runeberg.org
Collingwood, W. G. (1908). Scandinavian Britain. London: Society for Promoting Christian Knowledge. pp. 259–260. Retrieved 6 June 2015.
uib.no
Steintún, Bjarni (9 April 2015). "The Case System of the Hildina Ballad"(PDF). Bergen Abstracts for The Bergen-Cambridge Postgraduate Symposium. University of Bergen. Retrieved 6 June 2015.