“Nordic Witchcraft in Transition: Impotence, Heresy, and Diabolism in 14th-century Bergen”, Scandia. Tidskrift för historisk forskning, vol. 63, no. 1, p. 17-33, 1997.
charms
“Anaphrodisiac Charms in the Nordic Middle Ages: Impotence, Infertility, and Magic”, Norveg. The Norwegian Journal of Folklore, vol. 38, p. 19-42, 1998.
“gandr-Göndul: Än en gång”, in Grammatik i fokus. I. Nordisk filologi, Lund: Lunds universitet, 2003, p. 117-23.
“Skírnismál and Nordic Charm Magic”, in Reflections on Old Norse Myths, Turnhout: Brepols, 2007, p. 75-94. Website
“The n-Rune and Nordic Charms”, in “Vi ska alla vara välkomna!” Nordiska studier tillägnade Kristinn Jóhannesson, Göteborg : Meijbergs Arkiv för svensk ordforskning, 2008, p. 219-29. Website
Witchcraft and Magic in the Nordic Middle Ages. Philadelphia: University of Pennsylvania Press, 2011. Website
