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3. Beck, A.T., Kovacs, M., and Weissman, A. Hopelessness and suicidal behavior: An overview. Journal of the American Medical Association, 1975, 234, 1136–1139.
4. Beck, A.T., and Shaw, B.F. Cognitive approaches to depression. In A. Ellis and R. Grieger (Eds.), Handbook of rational emotive theory and practice. New York: Springer, 1977.
5. Braff, D.L., and Beck, A.T. Thinking disorder in depression. Archives of General Psychiatry, 1974, 33, 456–459.