Beck, AT; Steer, RA; Kovacs, M (1985), «Hopelessness and eventual suicide: a 10-year prospective study of patients hospitalized with suicidal ideation», American Journal of Psychiatry142 (5): 559–563, doi:10.1176/ajp.142.5.559, PMID3985195
Beck, AT; Weissman, A; Lester, D; Trexler, L (1974), «The measurement of pessimism: the hopelessness scale», Journal of Consulting and Clinical Psychology (Journal of Consulting and Clinical) 42 (6): 861–5, doi:10.1037/h0037562, PMID4436473
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ncbi.nlm.nih.gov
Beck, AT; Steer, RA; Kovacs, M (1985), «Hopelessness and eventual suicide: a 10-year prospective study of patients hospitalized with suicidal ideation», American Journal of Psychiatry142 (5): 559–563, doi:10.1176/ajp.142.5.559, PMID3985195
Beck, AT; Weissman, A; Lester, D; Trexler, L (1974), «The measurement of pessimism: the hopelessness scale», Journal of Consulting and Clinical Psychology (Journal of Consulting and Clinical) 42 (6): 861–5, doi:10.1037/h0037562, PMID4436473