Jacobs, Melville. 1931. "A Sketch of Northern Sahaptin Grammar." In University of Washington Publications in Anthropology, 4 , no. 2: 85-292.
Holton, Gary. The Phonology and Morphology of the Tanacross Athabaskan Language. PhD thesis, Santa Barbara: University of California, 2000. Online: http://hdl.handle.net/11122/6806