- Per gli autori latini: Thesaurus Linguae Latinae (TLL) consultabile al link: https://www.thesaurus.badw.de/en/tll-digital/index/a.html#a
- Per gli autori greci: Liddell-Scott, A Greek-English Lexicon (LSL) consultabile al link: http://stephanus.tlg.uci.edu/lsj/01-authors_and_works.html