22. David F. Musto, «America’s First Cocaine Epidemic», The Wilson Quarterly 13, no. 3 (лето 1989): 59–64; Curtis Marez, Drug Wars: The Political Economy of Narcotics, Minneapolis: University of Minnesota Press, 2004); Robert Christison, «Observations on the Effects of the Leaves of Erythroxylon Coca», British Medical Journal 1 (29 апреля 1876): 527–31.