Gimbutas, Marija. The Prehistory of Eastern Europe. Cambridge, MA: Peabody Museum, 1956. Print.

Eller, Cynthia. The Myth of Matriarchal Prehistory: Why an Invented past Won’t Give Women a Future. Boston: Beacon, 2006. Print.

Jackson, James W. “Villa of the Mysteries.” Old Stones: The Monuments of Art History. Accessed June 01, 2015.

Ratke, Sharon. “Guldgubber – a Glimpse into the Vendel Period.” Guldgubber – a Glimpse into the Vendel Period., n.d. Web. 27 Nov. 2013.

Harvig, Lise Lock. “What Vikings Really Looked like.” N.p., n.d. Web. 06 Dec. 2013.

Jones, Gwyn. A History of the Vikings. London: Oxford UP, 1968. Print.

Dennis, Andrew, Peter Foote, and Richard Perkins. Laws of Early Iceland: Grágás, the Codex Regius of Grágás, with Material from Other Manuscripts. Winnipeg, Canada: U of Manitoba, 1980. Print.

Neher, Andrew. “A Physiological Explanation of Unusual Behavior in Ceremonies Involving Drums.” Transcultural Psychiatry 1, no. 2 (1964): 91-93. doi:10.1177/136346156400100204.

Eliade, Mircea, and Willard R. Trask. Rites and Symbols of Initiation: The Mysteries of Birth and Rebirth. New York: Harper & Row, 1965. Print.

Eliade, Mircea, and Willard R. Trask. Shamanism: Archaic Techniques of Ecstasy. New York: Bollingen Foundation; Distributed by Pantheon, 1964. Print.