1. D'Augustino RB, Stevens MA, editors. Goodness of Fit Techniques. New York: Marcel Dekker, 1986:97–106.
2. An instrument for measuring depression;Beck;Arch Gen Psychiatry,1961
3. Disability in everyday tasks and subjective status of patients with advanced amyotrophic lateral sclerosis;Bocker;Fortschr Neurol Psychiatr,1990
4. Brown GN, Harris T. Social Origins of Depression. A Study of Psychiatric Disorder in Women. London: Routledge, 1978.
5. Psychological functions in individuals with amyotrophic lateral sclerosis;Brown;Psychiatr Med,1970