Islamic Inner Asia . Living Tongues Institute for Endangered Languages (2014) · http://www.livingtongues.org/hotspots/hotspot.GSA.Apatani.HillMiri.Nishi.html

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