DART Europe
HathiTrust Digital Library
International Directory of Philosophy
JSTOR
Oxford Handbooks Online - Philosophy Foundation 2012-2016
Oxford Reference Online
Patrologia Graeca
Philosophy Documentation Center's E-Collection
Philosophy Research Index (Philpapers)
Project MUSE
ProQuest Dissertations & Theses Global
Rise and Decline of the Roman World / Aufstieg und Niedergang der römischen Welt (ANRW)
ScienceDirect
SpringerLink
Stanford Encyclopedia of Philosophy
ULAKBIM Ulusal Veri Tabanlari (UVT) - ULAKBIM Turkish National Databases
Philosophy - Oxford Reference Online
Web of Science
Wiley Online Library