Patristics/Early Church History

Handbook of Patristic Exegesis [electronic resource] by Charles Kannengiesser

Late Antiquity by G. W. Bowersock (Editor); Peter Brown (Editor); Oleg Grabar (Editor)

Brill's New Pauly (22 Vols) by Hubert Cancik (Editor); Helmuth Schneider (Editor); Manfred Landfester (Editor)

The Oxford Encyclopedia of Ancient Greece and Rome by Michael Gagarin (Editor)

The Oxford Classical Dictionary by Simon Hornblower; Antony Spawforth; Esther Eidinow

The Oxford Dictionary of Late Antiquity by Oliver Nicholson (Editor)

Politische Geschichte by Hildegard Temporini (Editor, Editor); Wolfgang Haase (Editor)

Der Kleine Pauly: Lexikon der Antike auf der Grundlage von Pauly's Realencyclopädie der classischen Altertumswissenschaft. by Ziegler, Konrat, and Walther Sontheimer. 

Paulys Realencyclopädie der classischen Altertumswissenschaft. Register der Nachträge und Supplemente by Pauly, August Friedrich von.

Paulys Realencyclopädie der classischen Altertumswissenschaft. Gesamtregister by Christa Frateantonio; Pauly-Wissowa; Tobias Erler; Matthias Kopp; Dorothea Sigel; Dorothea Steiner