Schadow, Celina, Michael Schredl, Janina Rieger, and Anja S. Göritz. “The Relationship Between Lucid Dream Frequency and Sleep Quality: Two Cross-Sectional Studies”. International Journal of Dream Research 11, no. 2 (November 1, 2018): 154–159. Accessed April 19, 2024. https://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/48341.