Full text databases:

Philosophy Documentation Center (all issues)

EBSCO Academic Search Premiere (issues since 2006)

Indexes:

Scopus

DOAJ

EuroPub

Philosopher’s Index

The Central European Journal of Social Sciences and Humanities

Index Copernicus

Google Scholar

PhilPapers

Base d’Information Bibliographique en Patristique (Papers on Patristics)

WorldCat

Atla Religion Database

ERIH Plus