*Maximos, Mitropolit de Sardes. ''The Oecumenical Patriarchate in the Orthodox Church''. Thessaloniki: Patriarchal Institute for Patristic Studies, 1976. (Un studiu greu de găsit, dar aprofundat și detaliat al problemei din perspectia unui canonist constantinopolitan).

*''The Oxford Dictionary of Byzantium'', vol. I

*''The Rudder of the Orthodox Catholic Church: The Compilation of the Holy Canons Saints Nicodemus and Agapius'' (West Brookfield, MA: The Orthodox Christian Educational Society, 1983) [Compilație de Canoane ale Bisericii Ortodoxe]