↑Michael Lerche Nielsen, Review of Rune Palm, Vikingarnas språk, 750–1100, Historisk Tidskrift 126.3 (2006) 584–86 (pdf pp. 10–11Archivováno 24. 4. 2018 na Wayback Machine.) (švédsky)
↑Louis John Paetow, A Guide to the Study of Medieval History for Students, Teachers, and Libraries, Berkeley: University of California, 1917, OCLC185267056, p. 150, citing Léopold Delisle, Littérature latine et histoire du moyen âge, Paris: Leroux, 1890, OCLC490034651, p. 17.