Weil, AT (Mar–May 1981). "The therapeutic value of coca in contemporary medicine". Journal of Ethnopharmacology. 3 (2–3): 367–76. doi:10.1016/0378-8741(81)90064-7. PMID6113306.
Weil, AT (Mar–May 1981). "The therapeutic value of coca in contemporary medicine". Journal of Ethnopharmacology. 3 (2–3): 367–76. doi:10.1016/0378-8741(81)90064-7. PMID6113306.