Yelizarova О., S. Hozak, Parats А., Shumak О., and Filonenko О., “Topicality of the optimization of day’s routine and school day load in primary school age children”, Environment & Health, vol. 75, no. 4, pp. 36–40, Oct. 2015, doi: 10.1016/j.sleep.2011.03.017.