Historically, Kurtöp and its speakers have had close contact with speakers ofBumthang,Nupbi andKheng languages, nearby languages of central and eastern Bhutan to the extent that they may be considered part of a wider collection of "Bumthang languages".[3][4][5]
Hyslop, G. (2008). "Kurtöp Phonology in the Context of North East India". In Morey, S.; Post, M. (eds.).North East Indian Linguistics.North East Indian Linguistics 1: Papers from the First International Conference of the North East Indian Linguistic Society. Cambridge: Cambridge University Press. pp. 3–25.doi:10.1017/UPO9788175968431.003.ISBN978-81-7596-843-1.
Hyslop, G. (2008b)."Kurtöp and the classification of the languages of Bhutan"(PDF).South Asian Linguistics, Case, Voice, and Language Coexistence. Proceedings from the 42nd Annual Meeting of the Chicago Linguistic Society 42. Vol. 2.Chicago: University of Chicago Press.
van Driem, George L.; Tshering, Karma (1998).Dzongkha. Languages of the Greater Himalayan Region. Leiden: Research School CNWS, School of Asian, African, and Amerindian Studies.ISBN90-5789-002-X.
