Saya mau tau Nota kaki dari Ragnar Lodbrok. Jelaskan dalam bahasa melayu

Strerath-Bolz, Ulrike (1993). Review of Rory McTurk, Studies in "Ragnars saga loðbrókar" and Its Major Scandinavian Analogues, Alvíssmál 2: 118–19.

Forte, Angelo, Richard Oram, and Frederik Pedersen (2005). Viking Empires. Cambridge University Press, .

Schlauch, Margaret (transl.) (1964). The Saga of the Volsungs: the Saga of Ragnar Lodbrok Together with the Lay of Kraka. New York: American Scandinavian Foundation.