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van de Wal, Marieke A., Marieke FM Gielissen, Petra Servaes, Hans Knoop, Anne EM Speckens, i Judith B. Prins. "Study Protocol of the SWORD-study: A Randomised Controlled Trial Comparing Combined Online and Face-to-face Cognitive Behaviour Therapy Versus Treatment As Usual in Managing Fear of Cancer Recurrence." BMC Psychol 2015.

van de Wal, Marieke A., et al. "Study Protocol of the SWORD-study: A Randomised Controlled Trial Comparing Combined Online and Face-to-face Cognitive Behaviour Therapy Versus Treatment As Usual in Managing Fear of Cancer Recurrence." BMC Psychol 2015.