Gelso, C. J., & Carter, J. A. (1985). The relationship in counseling and psychotherapy: Components, consequences, and theoretical antecedents. The Counseling Psychologist, 13(2), 155-244. doi:10.1177/0011000085132001
Gelso, C. J., Kelley, F. A., Fuertes, J. N., Marmarosh, C., Holmes, S. E., Costa, C., & Hancock, G. R. (2005). Measuring the real relationship in psychotherapy: Initial validation of the therapist form. Journal of Counseling Psychology, 52(4), 640-649. doi: 10.1037/0022-0167.52.4.640