Geōrgios N. Philias

• Eisagōgē stēn historia kai theologia tōn ekklēsiastikōn hymnōn
• Hē ennoia tēs "ogdoēs hēmeras" stē latreia tēs orthodoxēs ekklēsias
• Ho tropos anagnōseōs tōn euchōn stē latreia tēs Orthodoxou Ekklēsias