Conti L, Ruggeri M, Faravelli C: Strumenti di valutazione e di misura. In: Cassano GB et al. (Eds.) "Trattato Italiano di Psichiatria", Masson, Milano, 1993.
Deyo RA, Carter WB: Strategies for improving and expanding the application of health status measures in clinical settings. Medical Care, 30:176, 1992.
Faravelli C: Le scale di valutazione in psichiatria. Quaderni Italiani di Psichiatria, 2:97, 1983.
Galton F: Statistics of mental imagery. Mind, 19:21, 1880.
Hamilton M: Les échelles d'appréciation dans la depression: état actuel. In: Pichot P, Pull C (Eds.) "La symptomatologie dépressive: enregistrement et évaluation", Editions Spire, Paris, 1981.
Kempf EJ: The behavior chart in mental disease. Am J Insan, 71:761, 1915.