Gottschalk, L. A., Winget, C. M., Gleser, G. C., Springer, K. J., Gottschalk, L. A., & Auerbach, A. H. (1966). The measurement of emotional changes during a psychiatric interview: a working model toward quantifying the psychoanalytic concept of affect. In Methods of research in psychotherapy. Appleton-Century-Crofts.