References
- Mac Lean D. E., Pournelle J. E. Feasibility of synthetic substitutes for heroin, an analysis of economic factors affecting illegal production. 1972, unpublished
- Bureau of Narcotics and Dangerous Drugs. Thebaine derivatives: physical dependence capacity in agonist members of the Bentley series. 1972, unpublished
- The Merck Index8th ed. Merck and Co., Inc., Rahway, New Jersey 1968; 444