1. Statistical Analysis in Psychology and Education;Ferguson,1976
2. Anatomy and physiology of a descending pain control system;Fields,1979
3. Opiate and opiate peptide effects on brain stem neurons: relevance to nociception and antinociceptive mechanisms;Gebhart;Pain,1982
4. Anatomical similarities between medullary and spinal dorsal horns;Gobel,1981
5. Central mechanisms of pain inhibition: studies of analgesia from focal brain stimulation;Liebeskind,1974