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Long-term cocaine self-administration under fixed-ratio and second-order schedules in monkeys.

Czoty PW, Reboussin BA, Calhoun TL, Nader SH, Nader MA. Long-term cocaine self-administration under fixed-ratio and second-order schedules in monkeys. Psychopharmacology (Berl). 2007 Apr; 191(2):287-95.

View in: PubMed