Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill. Brill Online: http://iedo.brillonline.nl.ludwig.lub.lu.se/dictionaries/content/proto-celtic/index.html
Trésors de la langue francaise informatisées. Centre national de ressources techniques et lexiques. http://www.cnrtl.fr/definition/
Robert Farren, PIE culture words collection, 2017
A Greek-English Lexicon (1961=1940). Compiled by Henry George Liddell and Robert Scott. Oxford: Ath the Clarendon Press.
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