Six Icelandic Magicians after the Time of Sæmundur Fróği Författare: Ağalsteinsson, Jón Hnefill Artikel i Arv. Nordic Yearbook of Folklore (1996)

Sæmundr Froği. A Medieval Master of Magic Författare: Ağalsteinsson, Jón Hnefill Artikel i Arv. Nordic Yearbook of Folklore (1994)

The Testimony of Waking Consciousness and Dreams in Migratory Legends concerning Human Encounters with the Hidden People Författare: Ağalsteinsson, Jón Hnefill Artikel i Arv. Nordic Yearbook of Folklore (1993)

Folk Narrative and Norse Mythology Författare: Ağalsteinsson, Jón Hnefill Artikel i Arv. Nordic Yearbook of Folklore (1990)

Wrestling with a ghost in Icelandic popular belief Författare: Ağalsteinsson, Jón Hnefill Artikel i Arv. Nordic Yearbook of Folklore (1987)