== Sources ==
[http://www.jewishencyclopedia.com/view.jsp?artid=1521&letter=A#4364 Jewish Encyclopedia]
Orthodox Life, Vol. 27, No. 6 (Nov.-Dec., 1977), pp. 39-47.
[http://www.jewishencyclopedia.com/view.jsp?artid=1521&letter=A#4364 Jewish Encyclopedia]*{{note|1}}From ''Byzantine Theology: Historical Trends and Doctrinal Themes'' by Fr. [[John Meyendorff]]. New York: Fordham University Press, 1974, p. 27. ISBN 0-8232-0967-9.
==External links==
