1. Diagnostic and Statistical Manual of Mental Disorders. Ed. 4, Text Revision (DSM-IV-TR);American Psychiatric Association,2000
2. Bipolar disorders: roots and evolution;Marneros,2000
3. Focus on dysthymic disorder and chronic depressions;Pages,1997
4. Manic-Depressive Illness;Goodwin,1990
5. Are there two types of unipolar depression?;Kupfer;Arch Gen Psychiatry,1975