チベット諸語
Beyer, Stephan V. (1992). The Classical Tibetan Language. SUNY Press. ISBN 0-7914-1099-4
Denwood, Philip (1999). Tibetan. John Benjamins Publishing. ISBN 90-272-3803-0
Denwood, Philip (2007). “The Language History of Tibetan”. In Roland Bielmeier, Felix Haller. Linguistics of the Himalayas and beyond. Walter de Gruyter. pp. 47–70. ISBN 3-11-019828-2.
van Driem, George (2001). Languages of the Himalayas: An Ethnolinguistic Handbook of the Greater Himalayan Region containing an Introduction to the Symbiotic Theory of Language. Brill. ISBN 9004103902