Judy, Mark A. (1987). "Powder Keg on the Upper Missouri: Sources of Blackfeet Hostility, 1730-1810". American Indian Quarterly. 11 (2): 127–144. doi:10.2307/1183693. JSTOR1183693.
Binnema, Theodore (1992). Conflict or Cooperation? Blackfoot Trade Strategies, 1794–1815 (MA). Edmonton, Alberta: University of Alberta. pp. 29–30. doi:10.7939/R3K35MN3G.
Judy, Mark A. (1987). "Powder Keg on the Upper Missouri: Sources of Blackfeet Hostility, 1730-1810". American Indian Quarterly. 11 (2): 127–144. doi:10.2307/1183693. JSTOR1183693.