1. A study of pain as a symptom of psychiatric illness;Spear,1964
2. Psychological and Psychiatric Aspects of Pain;Merskey,1967
3. Pain and other somatic complaints in a psychiatric clinic;Klee;Md St. Med. J.,1959
4. Somatic manifestations of neurosis;Douglas-Wilson;Br. Med. J.,1964
5. Psychiatric headache: A clinical study;Gittleson;J. Ment. Sci.,1961