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2. Rating scales for affective disorders: their validity and consistency;Bech;Acta Psychiat. Scand.,1981
3. Quantitative rating of manic states;Bech;Acta Psychiat. Scand.,1975
4. Assessment of depression: the Depression Inventory;Beck,1974
5. An inventory for measuring depression;Beck;Arch. Gen. Psychiatry,1961