1. Acheson, R. M., Observer error and variation in the interpretation of electrocardiograms in an epidemiological study of coronary heart disease. British Journal of Preventive and Social Medicine, 1960, 14, 99–122.
2. American Psychiatric Association. Diagnostic and statistical manual, mental disorders, first edition. Washington, D.C., 1952.
3. Ash, P., The reliability of psychiatric diagnosis. Journal of Abnormal and Social Psychology, 1949, 44, 272–277.
4. Beck, A. T., Reliability of psychiatric diagnoses: A critique of systematic studies. American Journal of Psychiatry, 1962, 119, 210–216.
5. Beck, A. T., Ward, C. H., Mendelson, M., Mock, J. E., & Erbaugh, J. K., Reliability of psychiatric diagnoses. II. A study of consistency of clinical judgments and ratings. American Journal of Psychiatry, 1962, 119, 351–357.