Zink, Nicolas, and Reinhard Pietrowsky. “Theories of Dreaming and Lucid Dreaming: An Integrative Review towards Sleep, Dreaming and Consciousness”. International Journal of Dream Research 8, no. 1 (May 18, 2015): 35–53. Accessed March 29, 2024. https://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/17811.