[Ansaldo, Umberto et al. 2007. Deconstructing Creole. Amsterdam: Benjamins.10.1075/tsl.73]Search in Google Scholar
[Beekes, Robert. 1996. “Ancient European Loanwords”, H.S. 109: 215-236.]Search in Google Scholar
[Beekes, Robert. 2009. Etymological Dictionary of Greek (2 vol.). Leiden: Brill.]Search in Google Scholar
[Benozzo, Francesco. 2010. “The Mesolithic Distillation of Pitch and its Ethnolinguistic Reflections: A Holocene Etymology for an Italian Verb”, In: Giovanni Belluscio and Antonio Mendicino (eds.), Scritti in onore di Eric Pratt Hamp per il suo 90. compleanno, Università della Calabria: 29-42.]Search in Google Scholar
[Bonfield Kath, Carl Heron and Nadia Nemcek. 1997. “The Chemical Characterization of Wood Tars in Prehistoric Europe”, In: Wojciech Brzeziński and Wojciech Piotrowski (eds.), Proceedings of the First International Symposium on Wood Tar and Pitch, Warszawa: State Archaeological Museum: 203-211.]Search in Google Scholar
[Caudullo, Giovanni, Welk, Erik, San-Miguel-Ayanz, Jesús. 2017. “Chronological maps for the main European woody species”, Data in Brief 12: 662-666.10.1016/j.dib.2017.05.007]Search in Google Scholar
[de Charencey, Hyacinthe.1902. Basque et Gaulois. Bruxelles: Istas.]Search in Google Scholar
[Clackson, James and Geoffrey Horrocks. 2007. The Blackwell History of the Latin Language. Malden: Blackwell Publishing.]Search in Google Scholar
[Delamarre, Xavier. 2003. Dictionnaire de la langue gauloise. Paris: Errance.]Search in Google Scholar
[Derksen, Rick. 2008. Etymological Dictionary of the Slavic Inherited Lexicon. Leiden: Brill.]Search in Google Scholar
[Deroy, Louis. 1956. L’Emprunt linguistique. Liège: Presses universitaires de Liège.]Search in Google Scholar
[Deshayes, Albert. 2003. Dictionnaire étymologique du breton. Douarnenez: Chasse-Marée.]Search in Google Scholar
[De Vaan Michiel. 2008. Etymological Dictionary of Latin and the Italic Languages. Leiden: Brill.]Search in Google Scholar
[Dillon, Myles. 1944. “Italic and Celtic”, The American Journal of Philology, 65-2: 124-13410.2307/290994]Search in Google Scholar
[Eilers, Wilhelm and Manfred Mayrhofer. 1962. “Kurdish būz und die Indogermanische Buchen-sippe.”, Mitteilungen der anthreopologischen Gesselschaft in Wien, 92: 61-92.]Search in Google Scholar
[Friedrich, Paul. 1970. Proto-Indo-European Trees. Chicago: University of Chicago Press.10.9783/9781512801200-003]Search in Google Scholar
[Gibby, Evard. 1999. “Making Pitch Sticks”, In: David Wescott (ed.), Primitve Technology. Layton: Gibbs Smith: 189-190.]Search in Google Scholar
[Henry, Victor. 1900. Dictionnaire étymologique du breton moderne. Rennes: Plihon and Hervé.]Search in Google Scholar
[Hyllested, Adam. 2010. “The Precursors of Celtic and Germanic”, Proceedings of the 21st Annual UCLA Indo-European Conference. Bremen: Hempen Verlag: 107-128.]Search in Google Scholar
[Kloekhorst, Alwin. 2008. An Etymological Dictionary of the Hittite Inherited Lexicon. Leiden: Brill.]Search in Google Scholar
[Köbler, Gerhard. 2006. Deutsches Etymologisches Wörterbuch, http://www.koeblergerhard.de/derwbhin.html (accessed 23.02.2018)]Search in Google Scholar
[Krahe, Hans. 1964. Unsere ältesten Flussnamen. Wiesbaden: Harrassowitz.]Search in Google Scholar
[Kroonen Guus. 2013. Etymological Dictionary of Proto-Germanic. Leiden: Brill.]Search in Google Scholar
[Lansberg, William. 1940. “Evidence of a Mediterranean Substratum in Celtic”, Language XVI-2: 95-98.10.2307/408944]Search in Google Scholar
[LaPolla, Randy. 2009. “Causes and Effects of Substratum, Superstratum and Adstratum Influence, with Reference to Tibeto-Burman Languages”, In: Yagano Yasuhiko (ed.) Senri Ethnological Studies: Issues in Tibeto-Burman Historical Linguistics, 75: 227–237.]Search in Google Scholar
[MacBain, Alexander. 1911. Etymological Dictionary of the Gaelic Language. Stirling: Eneas McKay.]Search in Google Scholar
[Matasović, Ranko. 2009. Etymological Dictionary of Proto-Celtic. Leiden: Brill.]Search in Google Scholar
[Matasović, Ranko. 2012. “The substratum in Insular Celtic”, Journal of Language Relationship, 8: 153-159.10.31826/jlr-2012-080111]Search in Google Scholar
[Meillet, Antoine. 1925. La Méthode comparative en linguistique historique. Paris: Champion.]Search in Google Scholar
[Migge, Bettina. 2003. Creole Formation as Language Contact: The Case of the Suriname Creoles. Amsterdam: Benjamins.10.1075/cll.25]Search in Google Scholar
[Odlin, Terence. 1992. “Transferability and linguistic substrates”, Second Language Research. Special issue on Crosslinguistic Influence, 8(3): 171-202.10.1177/026765839200800302]Search in Google Scholar
[Pedersen, Holger and Henry Lewis. 1989. A Concise Comparative Celtic Grammar. Göttingen: Vandenhoeck & Ruprecht.]Search in Google Scholar
[Pokorny, Julius.1966. Indogermanisches etymologisches Wörterbuch. Bern: Francke.]Search in Google Scholar
[Pokorny, Julius, Aleksander Lubotsky, and George Starostin. 2007. Proto-Indo-European Etymological Dictionary, Dnghu Association database at http://dnghu.org/]Search in Google Scholar
[Quattrocchi, Umberto. 2012. CRC World Dictionary of Medicinal and Poisonous Plants. New-York: CRC Press.]Search in Google Scholar
[Quentel, Gilles. 2012a. “Early Linguistic Contacts between Continental Celtic and Germanic - Lexical Aspects”, In: Andrzej Kątny (ed.), Sprachkontakte in Zentraleuropa. Berlin: Peter Lang: 177-185.]Search in Google Scholar
[Quentel, Gilles. 2012b. “The Pre-Indo-European Scandinavian Lexicon”, In: Andrzej Kątny (ed.), Sprachkontakte in Zentraleuropa. Berlin: Peter Lang: 167-176.]Search in Google Scholar
[Quentel, Gilles. 2018. La Genèse du lexique français – Des origines au Moyen-Age. Berlin : Peter Lang.10.3726/b11534]Search in Google Scholar
[Quentel, Gilles and Marta Kaźmierczak. 2018. Historia fonética de la Península Ibérica. Gdańsk: Gdańsk University Press.]Search in Google Scholar
[Regert, Martine. 2010. “Investigating the History of Prehistoric Glues by Gas Chromatography-Mass Spectrometry”, Journal of Separation Science 27: 244-254.10.1002/jssc.200301608]Search in Google Scholar
[Rejzek, Jiři. 2001. Dictionnaire étymologique tchèque. Prague: Leda.]Search in Google Scholar
[Rey, Alain et al. 2012. Dictionnaire historique de la langue française (3 vol.). Paris : Le Robert.]Search in Google Scholar
[Sapir, Edward. 1921. Language : An Introduction to the Study of Speech. New-York: Harcourt Brace.]Search in Google Scholar
[Schrijver, Peter. 1997. “Some Western European Substratum Words”, In: Alexander Lubotsky (ed.), Sound Law and Analogy: papers in honor of Robert S.P. Beekes on the occasion of his 60th birthday. Amsterdam: Rodopi: 293-316.]Search in Google Scholar
[Schrijver Peter. 2015. “The meaning of Celtic *eburos”, In : Guillaume Oudaer, Gaël Hily and Hervé Le Bihan (eds.), Mélanges en l'honneur de Pierre-Yves Lambert. Rennes: TIR : 65-76.]Search in Google Scholar
[Sims-William, Patrick. 2018. “IE*peug'-/*peuk'-”to pierce” in Celtic” Transactions of the Philological Society 116-1: 117-130.10.1111/1467-968X.12107]Search in Google Scholar
[Starostin, Sergey, Anna Dybo and Oleg Mudrak. 2003. An Etymological Dictionary of the Altaic Languages. Amsterdam: Brill.]Search in Google Scholar
[Trask Larry. 2008. Etymological Dictionary of Basque. Brighton: University of Sussex.]Search in Google Scholar
[Vendryes, Joseph.1914. “Etymologies”, Revue Celtique 35: 85-91.]Search in Google Scholar
[Vennemann, Theo. 2003. Europa Vasconica – Europa Semitica. The Hague: Mouton De Gruyter.10.1515/9783110905700]Search in Google Scholar
[Watkins Calvert. 2000. The American Heritage Dictionary of Indo-European Roots, 2nd ed. Boston: Houghton Mifflin Harcourt.]Search in Google Scholar
[Winn, Shan. 1997. Heaven, Heroes, and Happiness: The Indo-European Roots of Western Ideology. Lanham: University Press of America.]Search in Google Scholar