1. Ingstad, Helge: Westward to Vinland (The Discovery of Pre-Columbian Norse House- sites in North America), Harper Colophon Books, Harper and Row Publishers, Inc., 1972, First paperback edition (the first hardcover edition was published in 1969 by St. Martin's Press), Standard Book Number: 06-090281-7, translated from the Norwegian by Erik J. Friis.
Chapter 4: 'The Greenlanders' Saga'.
2. Jones, Gwyn: The Norse Atlantic Saga (Being the Norse Voyages of Discovery and Settlement to Iceland, Greenland, America), Oxford University Press, 1964, London.
page 48: quoted from the King's Mirror.
2a. page 57
3. Prowse, D. W.: A History of Newfoundland (from the English, Colonial and Foreign Records), Eyre and Spottiswoode, second edition (revised and corrected), London, 1896, page 3
3. Wallace S. Broecker, Chaotic Climate, Scientific American magazine, ISSN: 0036- 8733, Volume 273, Number 5, November 1995.