1. US Department of Health and Human Services, others, What are sleep deprivation and deficiency?, Internet: https://www.nhlbi.nih.gov/health/health-topics/topics/sdd/[Accessed 04/07/2014](2012).
2. Sleep and immune function;Besedovsky;Pflügers Archiv-European J. Physiol.,2012
3. This Thing Called Sleep;Walker,2017
4. Recommended amount of sleep for a healthy adult: a joint consensus statement of the american academy of sleep medicine and sleep research society;Consensus Conference Panel;J. Clin. Sleep Med.,2015
5. Why sleep matters-the economic costs of insufficient sleep: a cross-country comparative analysis;Hafner;RAND Health Q,2017