1. Effects of LSD on time-based schedules of reinforcement;Appel;Psychopharmacologia,1971
2. Repeated high doses of Δ1-tetrahydrocannabinol enhance acquisition of shock avoidance by rats;Barry,1971
3. Becoming a marihuana user;Becker;Am. J. Social.,1953
4. Some effects of (−)-Δ9-trans-tetrahydrocannabinol and other cannabis derivatives on schedule-controlled behavior;Black;Pharmacologist,1970
5. Tolerance to chronic administration of cannabis sativa (marihuana) in rats;Carlini;Pharmacology,1968