1. Adelstein, A. M. (1952). J. roy. stat. Soc. A., 115, 354.
2. Milbank mem;Arieti, S.; Arieti, S.; Meth, J.M.;American Handbook ofPsychiatry; Fd Quart,1959
3. In Causes of Mental Disorders: A Review of Epidemiological Knowledge;Book, J.A.;Amer. J. Psychiat; Milbank Memorial Fund,1961
4. Freud and the Post-Freudians;Brown, J.A.C.,1961
5. Brugger, C. (1931). Z. ges. Neurol. Psychiat., 133, 352.