Schredl, Michael, and Kate Isobel Olbrich. “Dream Recall After Multiple Sleep Latency Test Naps With and Without REM Sleep”. International Journal of Dream Research 12, no. 2 (October 1, 2019): 81–84. Accessed October 2, 2022. https://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/64730.