↑John Meyendorff, John Chapin, Nicolas Lossky(1981), The Orthodox Church: its past and its role in the world today, Crestwood, N.Y. : St Vladimir's Seminary Press, p.132 ISBN 0-913836-81-8
↑Ecumenical Patriarch Bartholomew: insights into an Orthodox Christian worldview (2007) John Chryssavgis International Journal of Environmental Studies, 64, (1);pp: 9 - 18