Changes

* Obolensky, Dimitri (1974), . ''[http://www.amazon.com/Byzantine-Commonwealth-Eastern-Europe-500-1453/dp/1597407356/ref=sr_1_1?ie=UTF8&s=books&qid=1276987239&sr=1-1 The Byzantine Commonwealth: Eastern Europe, 500-1453].''New York, NY: Praeger Publishers Inc., 1971. : ISBN 978-1597407359 (''hardcover; ACLS Humanities E-Book (May 1, 2009)''): ''(Available as an ebook download, [http://www.ebookee.com/The-Byzantine-commonwealth-Eastern-Europe-500-1453_271339.html here])''* Meyendorff, John (1982), . ''The Byzantine Legacy in the Orthodox Church''. St Vladimir's Seminary Press, 1982. ISBN 0913836907.