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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

Atlas of the World’s Languages in Danger . Christopher Moseley (ed.) (2010) · UNESCO Publishing http://www.unesco.org/culture/en/endangeredlanguages/atlas

Himalayan Languages Project: Gongduk . George Van Driem (retrieved 2014/07/23) · http://www.himalayanlanguages.org/?q=languages/gongduk

Endangered languages of South Asia ( pp. 303-341 ) . van Driem, George (2007) · In Language Diversity Endangered Trends in Linguistics: Studies and Monographs · edited by Brenzinger, Matthias · Mouton de Gruyter

Bhutan's endangered languages programme under the Dzongkha Development Authority: Three rare gems ( pp. 294-326 ) . George van Driem (2004) · In The Spider and the Piglet: Proceedings of the First International Seminar on Bhutan Studies edited by Karma Ura and Sonam Kinga · Thimphu: Centre for Bhutan Studies http://archiv.ub.uni-heidelberg.de/savifadok/2621/1/14_SpdrPglt.pdf