Kyla Wahlstrom et al., “Examining the Impact of Later High School Start Times on the Health and Academic Performance of High School Students: A Multi-Site Study,” Center for Applied Research and Educational Improvement (2014). См. также: Robert Daniel Vorona et al., “Dissimilar Teen Crash Rates in Two Neighboring Southeastern Virginia Cities with Different High School Start Times,” Journal of Clinical Sleep Medicine 7, no. 2 (2011): 145–151.