D. J. Gombert, R. Eckhaus, D. Kuehn, M. J. Hedlund Nelson, and C. Lee, “The Ripple Effect in the Expressive Therapies: A Theory of Change Explored Through Case Studies: A Theory of Change Explored through Case Studies”, Reflections, vol. 23, no. 4, pp. 20–40, Apr. 2018.