Vogt, Hans (1968), chapter Étymologie géorgienne, in J. C. Heesterman, G. H. Schokker, V. I. Subramoniam, editors, Pratidānam. Indian, Iranian and Indo-European Studies Presented to Franciscus Bernardus Jacobus Kuiper on His Sixtieth Birthday (Janua Linguarum. Studia Memoriae Nicolai Van Wijk Dedicata. Series Maior; 34), The Hague and Paris: Mouton