J. Swan, Durham, R, Hull, A, MacVicar, R, Donnan, P, Christmas, D, & Matthews, K. (2010).  Intensive psychotherapy for chronic, treatment resistant depression: a pilot investigation of clinical effectiveness and mediators of learning in the Cognitive Behavioural Analysis System of Psychotherapy (CBASP). Chief Scientist Office Reference CZG/2/461, Dundee, Scotland. Randomized Clinical Trial.


Wiersma, J.E., Van Schaik, DJF, van Oppen, P., McCullough, Jr., J.P, Schoever, R.A., Dekker, J.J. et al. (2008). Treatment of chronically depressed patients: A multisite randomized controlled trial testing the effectiveness of CBASP for chronic depressions versus usual secondary care. Randomized Clinical Trial, Free University, Amsterdam, Netherlands. Randomized Clinical Trial.