Βυζαντινό ημερολόγιο: Διαφορά μεταξύ των αναθεωρήσεων

* [http://www.webcitation.org/query?url=http://www.geocities.com/TimesSquare/Labyrinth/2398/bginfo/trade/time.html&date=2009-10-25+11:27:32 ByzantineΒυζαντινή waysτρόποι ofαπολογισμού reckoning timeχρόνου]

* [http://www.1911encyclopedia.org/Chronology#Era_of_Constantinople Era of Constantinople] atστην Classic Encyclopedia (''Based on 11th edition of the Encyclopædia Britannica, 1911'').

* [http://www.litencyc.com/php/stopics.php?rec=true&UID=5547 RussianΡωσικό CalendarΗμερολόγιο (988–1917)]. Charles Ellis, University of Bristol. ''The Literary Encyclopedia''. 25 September 2008.

* [http://www.smso.net/Calendar_era#Christian_era Calendar Era: Late Antiquity and Middle Ages: Christian era] atστην SMSO Encyclopedia (''SaudiΣαουδική MedicalΙατρική Siteιστοσελίδα Onlineonline'').

* Howlett, J. ''[http://www.newadvent.org/cathen/03731a.htm Biblical Chronology]''. InΣτην, ''The Catholic Encyclopedia (New Advent)''. New York: Robert Appleton Company, 1908.

* [http://www.webcitation.org/query?url=http://www.geocities.com/Athens/Aegean/2444/chronology.html&date=2009-10-25+05:47:41 ChronologyΧρονολόγιο ofτων theΒιβλικών Biblical PatriarchsΠατριαρχών].