ラズ語
Grove, Timothy (2012). Materials for a Comprehensive History of the Caucasus, with an Emphasis on Greco-Roman Sources. https://timothygrove.blogspot.com/2012/07/materials-for-comprehensive-history-of.html
Kojima, Gôichi (2003) Lazuri grameri Chiviyazıları, Kadıköy, İstanbul, ISBN 975-8663-55-0 (notes in English and Turkish)
Nichols, Johanna (1998). The origin and dispersal of languages: Linguistic evidence. In N. G. Jablonski & L. C. Aiello (Eds.), The origin and diversification of language.