1. Studies on Morphine Analgesia in an Animal Model of Tonic Pain;Abbott,1981
2. Abbott, F. V., Melzack, R. and Samuel, C., Morphine analgesia in the tail-flick and formalin pain tests is mediated by different neural systems, Exp. Neurol., in press.
3. Three bulbospinal pathways from the rostral medulla of the cat: an autoradiographic study of pain modulating systems;Basbaum;J. comp. Neurol.,1978
4. Endogenous pain control mechanisms: review and hypothesis;Basbaum;Ann. Neurol.,1978
5. The use of clinical agents in the control of pain;Beecher,1966