Appel, Kristoffer, and Gordon Pipa. “Auditory Evoked Potentials in Lucid Dreams: A Dissertation Summary”. International Journal of Dream Research 10, no. 1 (May 2, 2017): 98–100. Accessed April 23, 2024. https://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/37192.