KRUGER, BJORN, ANNA VOGELE, MAROUANE LASSIRI, LUKAS HERWARTZ, THOMAS TERKATZ, and ANDREAS WEBER. 2014. “SLEEP DETECTION USING DE-IDENTIFIED DEPTH DATA”. Journal of Mobile Multimedia 10 (3-4):327-42. https://journals.riverpublishers.com/index.php/JMM/article/view/4583.