Hanna, J. M., & Hornick, C. A. (1977). Use of coca leaf in southern Peru: Adaptation or addiction. Bulletin on Narcotics, 29(1), 63.
45
Verebey, K., & Gold, M. S. (1988) From coca leaves to crack: The effects of dose and routes of administration in abuse liability. Psychiatric Annals, 18, 513-520. doi: 10.3928/0048-5713-19880901-06
