1. Dementia praecox and paraphrenia;Kraepelin,1971
2. Dementia praecox or the group of schizophrenias;Bleuler,1950
3. Diagnostic and statistical manual of mental disorders,1994
4. ICD-10, The International Statistical Classification of Diseases and Related Health Problems, tenth revision,1992
5. Schizophrenia genesis: the origins of madness;Gottesman,1991