Early Christian and Byzantine Authors and Works
Clavis patrum graecorum / cura et studio Mauritii Geerard. (Turnout, 1974–) 5 vols.
Clavis patrum latinorum / commode recludit Eligius Dekkers. (Steenburgen, 1995)
Oxford dictionary of Byzantium / Alexander P. Kazhdan, editor in chief 3 vols. (Oxford, 1991) and online
Patristic Greek lexicon / edited by G. W. H. Lampe (Oxford, 1961)