The effects of morphine on responding under variable-interval schedules : rate-related effects, behavioral mechanisms and Herrnstein's hyperbola
Effects of lithium dose (UCS) on the acquisition and extinction of a discriminated morphine aversion : tests with morphine and Δ9-THC
Behavioural effects of glutamate receptor agonists in morphine-dependent rats
Sensitization to apomorphine in pigeons is due to conditioning, subject to generalization but resistant to extinction
Prenatal protein restriction increases sensitization to cocaine-induced stereotypy
Effects of training history on drug discrimination under concurrent fixed-interval schedules
Naltrexone does not attenuate the acute behavioral effects of ethanol or pentobarbital in humans
Evaluation of limited and unlimited food intake during withdrawal in triazolam-dependent baboons
Spatial learning deficit after NMDA receptor blockade and state-dependency
SR 141716A, a CB1 cannabinoid receptor antagonist, potentiates the locomotor stimulant effects of amphetamine and apomorphine
Isolation rearing-induced disruption of prepulse inhibition : further evidence for fragility of the response