Authors:
MAREK GJ
HEFFNER TG
RICHARDS JB
SHAUGHNESSY RA
LI AA
SEIDEN LS
Citation: Gj. Marek et al., EFFECTS OF CAFFEINE AND PD-116,600 ON THE DIFFERENTIAL-REINFORCEMENT-OF-LOW RATE 72-S (DRL 72-S) SCHEDULE OF REINFORCEMENT, Pharmacology, biochemistry and behavior, 45(4), 1993, pp. 987-990