1Henrikson, Alf, "Through the Ages" by Alf Henrikson. Crescent book, New York
An Illustrated Chronicle of Events from 2000 BC to the Present.(1905), Crescent Books, New York, Henriksons 1151-1180. "Henrickson's states Boris II was Russian, when actually he wasBulgarian, great grandson of Romanus I Lecapenus.".
2James Trager, Editor, Trager's The People's Chronology. A Year by Year Record of HumanEvents from Prehistory to Present., Holt, Rinehart, and Winston. New York. 1979.
3Maurice Ashley, Great Britain to 1688 a Modern History. 1961, the University of Michigan Press, Ann Arbor., Ashley Vol. I pages 88 through 94.
4GEDCOM File : ~AT175.ged, 29 Apr 1998.
5Frederick Lewis Weis, Ancestral Roots of Sixty Colonists, Genealogical Publishing Co. Inc of Baltimore. 1979. 5th Edition.
Weld County Library Ged 929.2 Greeley, Colorado. (Centennial ParkBranch)., Weis page 3 line 25.
6Webster's Biographical Dictionary, G. C. Merriam Co. Springfield, Mass. 1963 Edition, Websters, page 692.
7Gene Gurney, Kingdom's of Europe, Illustrated Encyclopedia of Ruling Monarchs FromAncient Times to the Present, Crown Publishers, New York. 1982, Gurney page 228.
8Grolier Encyclopedia., Grolier Electronic Publishing, Inc., Angevins (dynasties).
9C. A. Bloss, Heroines of the Crusades publ. 1853, Kerr, Doughty, and Lapham. Detroit., Bloss page 148-149.
10SOURCE #364, Angevins (dynasties).