Yakubovich, Ilya. (2010). Sociolinguistics of the Luvian Language. A Dissertation Submitted to the Faculty of the Division of the Humanities In Candidacy For the Degree of Doctor of Philosophy. Department of Near Eastern Languages and Civilizations and Department of Linguistics, University of Chicago. Academia.edu
Frangipane M. (2015). "Different types of multiethnic societies and different patterns of development and change in the prehistoric Near East." Proceedings of the National Academy of Sciences of the United States of America, 112(30), 9182–9189. https://doi.org/10.1073/pnas.1419883112
google.com
Popko, M. (2008). Völker und Sprachen Altanatoliens. Germany: Harrassowitz. Google Books
jstor.org
Glatz, C., & Matthews, R. (2005). Anthropology of a Frontier Zone: Hittite-Kaska Relations in Late Bronze Age North-Central Anatolia. Bulletin of the American Schools of Oriental Research, 339, 47–65. http://www.jstor.org/stable/25066902
robertbeekes.nl
Beekes, R. S. P. (2002). "The Origin of the Etruscans." Koninklijke Nederlandse Akademie van Wetenschappen,Amsterdam. Robert Beekes