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Wikipedia: Patriarch Adrian of Moscow

Anchor text: ''The Popular Patristics Series'' (Crestwood, NY: St. Vladimir's Seminary Press).

Wikipedia: Patristics

Anchor text: Formation and Struggles: The Birth of the Church AD 33-200

Wikipedia: Timeline of Eastern Orthodoxy in Greece (33–717)

Anchor text: St. Vladimir's Seminary Press

Wikipedia: Popular Patristics Series

Anchor text: Primacy in the Church: The Office of Primate and the Authority of Councils (Volume 2)

Wikipedia: Kyrillos Katerelos