1. Stress-induced increase in endogenous opiate peptides: concurrent analgesia and its partial reversal by naloxone;Akil,1976
2. Antagonism of stimulation-produced analgesia by p-CPA, a serotonin synthesis inhibitor;Akil;Brain Research,1972
3. Comparison chez le rat entre l'analgésie induite par stimulation de la substance grise péri-aqueducale at l'analgésie morphinique;Akil;C. R. Acad. Sci. (Paris),1972
4. Antagonism of stimulation-produced analgesia by naloxone, a narcotic antagonist;Akil;Science,1976
5. Neurons containing β-endorphin in rat brain exist separately from those containing enkephalin: immunocytochemical studies;Bloom,1978