New Pauly Online

Versione inglese (1996-)

Versione tedesca (1996-2003)

Oxford English Dictionary

https://www.oed.com/

PAO - Periodicals Archive Online

http://search.proquest.com/pao?accountid=13698

Patrologia latina

https://www.proquest.com/patrologialatina

Philosopher's Index with Full Text

https://research.ebsco.com/c/zgycs2/search/?db=pif

PIO - Periodicals Index Online

http://search.proquest.com/pio?accountid=13698

Project Muse

https://muse.jhu.edu/search

RILM Music Abstracts

https://research.ebsco.com/c/zgycs2/search/?db=ram

Sources Chretiennes Online

http://clt.brepolis.net.ezproxy.uniroma1.it/sco/Pages/Search/Basic.aspx

Supplementum Epigraphicum Graecum

https://scholarlyeditions.brill.com/sego/