1. Alekseev, Mikhail E., S. Z. Alixanov, Boris M. Ataev, M. A. Magomedov, I. I. Magomedov, G. I. Madieva, Patimat A. Saidova & Samedov Dzh. S. 2014. Sovremennyj avarskij jazyk [Modern Avar language]. Makhachkala: Aleph.
2. Alekseev, Mixail E. & Boris M. Ataev. 1998. Avarskij jazyk [The Avar language]. Moscow: Academia.
3. Bakker, Dik, Jorge G. Rendón & Ewald Hekking. 2008. Spanish meets Guaraní, Otomí and Quichua: A multilingual confrontation. In Thomas Stolz, Dik Bakker & Rosa Salas Palomo (eds.), Aspects of language contact: New theoretical, methodological and empirical findings with special focus on Romancisation processes, 165–238. Berlin & New York: De Gruyter.
4. Belyaev, Oleg. 2014. Contact influences on Ossetic. Unpublished manuscript. Moscow.
5. Bokarev, Evgenij A. 1959. Cezskie (didojskie) jazyki Dagestana [Tsezic (Dido) languages of Daghestan]. Moscow: Izdatel’stvo Akademii nauk SSSR.