William Adler. Time immemorial: archaic history and its sources in Christian chronography from Julius Africanus to George Syncellus. Washington, D.C.: Dumbarton Oaks Research Library and Collection, 1989 ( 0884021769).

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William Adler, Paul Tuffin, translators. The chronography of George Synkellos: a Byzantine chronicle of universal history from the creation. Oxford: Oxford University Press, 2002, ( 978-0199241903). Synkellos copied large blocks of text written by Annianus.

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Georges Declercq (2000) Anno Domini (The Origins of the Christian Era): Turnhout ( 9782503510507)

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Mosshammer, Alden A. (2008). The Easter computus and the origins of the Christian era. Oxford: Oxford University Press.  9780199543120.

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Otto Neugebauer (1979) Ethiopic Astronomy and Computus: Wien ( 9783700102892)

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Jan Zuidhoek (2019) Reconstructing Metonic 19-year Lunar Cycles (on the basis of NASA’s Six Millennium Catalog of Phases of the Moon): Zwolle ( 9789090324678)

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Five Metonic 19-year lunar cycles