Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·

South Asia and the Middle East ( pp. 283-348 ) . George van Driem (2007) · In Encyclopedia of the World's Endangered Languages edited by Christopher Moseley · London & New York: Routledge

The World Atlas of Language Structures . (2005) · edited by Bernard Comrie and David Gil and Martin Haspelmath and Matthew S. Dryer · Oxford University Press

A Grammar of Kulung . Gerard J. Tolsma (2006) · Brill's Tibetan Studies Library: Languages of the Greater Himalayn Region · Vol. 5/4 · Brill

A Grammar of Kulung . Gerard J. Tolsma (1999) ·