Lancee, Jaap, Jan van den Bout, and Victor I. Spoormaker. “Expanding Self-Help Imagery Rehearsal Therapy for Nightmares With Sleep Hygiene and Lucid Dreaming: A Waiting-List Controlled Trial”. International Journal of Dream Research 3, no. 2 (November 30, 2010): 111–120. Accessed May 19, 2022. https://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/6128.