Schredl, Michael, Emilie Pramschiefer, Phillip Simon, Hannah Lea Runge, and Gabriele Onneken. “Sleep Positions of Couples at Sleep Onset: Association With Relationship Quality and Relationship Duration”. International Journal of Dream Research 15, no. 2 (October 14, 2022): 255–259. Accessed November 21, 2024. https://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/90333.