Benelli, E., S. Filanti, R. Musso, V. Calvo, S. Mannarini, A. Palmieri, and M. Widdowson. “TA Treatment of Depression: A Hermeneutic Single-Case Efficacy Design Study - ‘Caterina’”. International Journal of Transactional Analysis Research & Practice, vol. 8, no. 1, Jan. 2017, pp. 21-38, doi:10.29044/v8i1p21.