1. Locomotor activity in morphine-dependent and post-dependent rats;Brady;Pharmacol. Biochem. Behav.,1981
2. U50,488: A k-selective agent with poor affinity for mu1 opiate binding sites;Clark;Neuropharmacology,1988
3. Differential cross-tolerance to opioids in squirrel monkeys responding under a titration schedule;Craft;Fed. Am. Soc. Exp. Biol. J.,1989
4. Differential cross-tolerance to opioid agonists in morphine-tolerant pigeons responding under a schedule of food presentation;Craft;J. Pharmacol. Exp. Ther.,1989
5. Opposite effects of mu and kappa opiate agonists on dopamine release in the nucleus accumbens and in the dorsal caudate of freely moving rats;Di Chiara;J. Pharmacol. Exp. Ther.,1988