Zonneveld, L. N. L., van Rood, Y. R., Timman, R., Kooiman, C. G., van't Spijker, A., & Busschbach, J. J. V. (2012). Effective Group Training for Patients with Unexplained Physical Symptoms: A Randomized Controlled Trial with a Non-Randomized One-Year Follow-Up. Public Library of Science.

Zonneveld, Lyonne N. L., Yanda R. van Rood, Reinier Timman, Cornelis G. Kooiman, Adriaan van't Spijker, and Jan J. V. Busschbach. Effective Group Training for Patients With Unexplained Physical Symptoms: A Randomized Controlled Trial With a Non-Randomized One-Year Follow-Up. Public Library of Science, 2012.

Zonneveld, Lyonne N. L., et al. Effective Group Training for Patients With Unexplained Physical Symptoms: A Randomized Controlled Trial With a Non-Randomized One-Year Follow-Up. Public Library of Science, 2012.