Rask, R., & Ege, N. (2013). Investigation of the origin of the Old Norse or Icelandic language (New ed.). John Benjamins Publishing Company.

Rask, Rasmus, and Niels Ege. Investigation of the Origin of the Old Norse or Icelandic Language. New ed. Amsterdam ; Philadelphia: John Benjamins Publishing Company, 2013.

Rask, Rasmus, and Niels Ege. Investigation of the Origin of the Old Norse or Icelandic Language. New ed. John Benjamins Publishing Company, 2013.