References

Additional sources and materials

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 Ryabova A. A. Tvorchestvo R. Sauti v russkikh perevodakh XIX - nachale XX veka. M., 2012, c. 16.
 Christensen R. T. The Phoenicians and the Ancient Civilization of America. 2013. URL.: http:// www.ancientamerica.org/library/media/HTML/1ofnf5kk/15. THE PHOENICIANS AND THE ANCIENT%.
 Baldwin J. T. The Phoenician Theory. Washington, 1871.
 Menzies G. 1421: The Year China Discovered the World. New York, 2008.
 Rees C. H. Chinese Sailed to America Before Columbus. New York, 2011.
 Hopkins A. Vikings: The Norse Discovery of America. New York, 2002.
 Vinding N. The Viking Discovery of America, 985 to 1008: The Greenland Norse and their Voyages to Newfoundland. New York, 2006.
 Deacon R. Madoc and the Discovery of America. New York, 1966.
 Price-Gattis J. The Legend of the Welsh Caves at Desoto Falls. Raleigh, 2008.
 Traxel W. Footprints of the Welsh Indians Settlers in North America Before 1492. New York, 2004.
 A Manual of Welsh Literature. Bangor, 1909, p. 73.
 Powel D. The Historie of Cambria. London, 1811, p. 167.
 Celtic Culture: A Historical Encyclopedia. Oxford, 2006, p. 1234.
 Morgan P. From a Death to a View: The Hunt for the Welsh Past in the Romantic Period. - Hobsbawm E., Renger T. The Invention of Tradition. Cambridge, 2012, r. 84.
 Johnson B. The Discovery of America… by a Welsh Prince? URL.: http://www.historic-uk.com/ HistoryUK/Historyof Wales/The-discovery-of-America-by-Welsh-Prince
 McLaird J. The Welsh, the Vikings, and the Lost Tribes of Israel on the Northern Plains: The Legend of the White Mandan. - The South Dakota History, v. 18, 1988, p. 246, 247.
 Original Journals of the Lewis and Clark Expedition. New York, 1904, p. 263.
 McNeillie A. Once. Bridgent, 2009, p. 89.
 Catlin G. Life the Indians. London, 1861, p. 134.
 DeLand Ch. South Dakota. Historical Collections. New York, 1908, p. 275.
 Stephens T. Madoc: An Essay on the Discovery of America by Madoc ap Owen Gwynedd in the Twelfth Century. London, 1893.
 Preiddeu Annwn. URL.: http://d.lib.rochester.edu/camelot/text/preiddeu-annwn
 Jones J. J. The Legend of Madoc. - Nation Library of Wales Journal, v. 2, no. 3 4, Summer, 1942, p. 121.
 Wood W. Raymond. Prologue to Lewis and Clark: The Mackay and Evans Expedition. Columbia, 1998, r. 7.