Indian languages: The historical linguistics of Native America. New York: Oxford University Press. ISBN 0-19-509427-1. Cook, Eung-Do. 1981. Athabaskan linguistics:
(2000). "The negative/irrealis category in Athabaskan–Eyak–Tlingit", ch. 6 pp. 101–138 in The AthabaskanLanguages: Perspectives on a Native American Language
。有些語言可能在某部分比較綜合,但在其他部分比較不綜合。(compare verbs and nouns in Southern Athabaskanlanguages). 语言系属分类 伍鐵平、金立鑫,【大百科詞條(稿)】語言類型學,中國社會科學院語言研究所官方學術交流平臺今日語言學,2019年4月16日
38th Conference on American Indian Languages (SSILA), Chicago, Jan. 2000 VAJDA, Edward J. 2000b. Yeniseian and Athabaskan–Eyak–Tlingit.' – Paper read at: