Masterton, J.P. (1965) Sleep of hospital medical staff. Lancet, 1, 41-42.
 Minors, D.S. and Waterhouse, J.M. (1981) Endogenous and exogenous components of circadian rhythms when living on a 21-hour day. International Journal of Chronobiology, 8, 31-48.
 Gomes, A.A., Azevedo, M.H. and Tavares, J. (2002) Sleep-wake patterns and academic performance in university students.
 Gray, E.K. and Watson, D. (2002) General and specific traits of personality and their relation to sleep and academic performance. Journal Personality, 70, 177-206.
 Roenneberg, T., Kuehnle, T., Pramstaller, P.P., Ricken, J., Havel, M., Guth, A., et al. (2004) A marker for the end of adolescence. Current Biology, 14, R1038-1039.
 Wolfson, A.R. and Carskadon, M.A. (1998) Sleep schedules and daytime functioning in adolescents. Child Development, 69, 875-887.
 Gaultney, J.F. (2011) The prevalence of sleep disorders in college students: Impact on academic performance. The Journal of American College Health, 59, 91-97.
 Shafiq, M., Shah, Z., Saleem, A., Siddiqi, M.T., Shaikh, K.S., Salahuddin, F.F., Siwani, R. and Naqvi, H. (2006) Perceptions of Pakistani medical students about drugs and alcohol: A questionnaire-based survey. Substance Abuse Treatment, Prevention, and Policy, 1, 31.
 Wolfson, A.R. and Carskadon, M.A. (2003) Understanding adolescent’s sleep patterns and school performance: A critical appraisal. Sleep Medicine Reviews, 7, 491-506. http://dx.doi.org/10.1016/S1087-0792(03)90003-7
 Perez-Chada, D., Perez-Lloret, S., Videla, A.J., Cardinali, D., Bergna, M.A., Fernández-Acquier, M., et al. (2007) Sleep disordered breathing and daytime sleepiness are associated with poor academic performance in teenagers. A study using the Pediatric Daytime Sleepiness Scale (PDSS). Sleep, 30, 1698.
 Johns, M.W., Dudley, H.A. and Masterton, J.P. (1976) The sleep habits, personality and academic performance of medical students. Medical Education, 10, 158-162.
 Denver, C. (2007) Adolescent sleep disturbance and school performance: The confounding variable of socioeconomics. Journal of Clinical Sleep Medicine, 3, 19.
 Czeisler, C.A. (2009) Medical and genetic differences in the adverse impact of sleep loss on performance: ethical considerations for the medical profession. Transactions of the American Clinical and Climatological Association, 120, 249.
 Eliasson, A., King, J. and Gould, B. (2002) Association of sleep and academic performance. Sleep and Breathing, 6, 45-48. http://dx.doi.org/10.1055/s-2002-23157
 Veasey, S., Rosen, R., Barzansky, B., Rosen, I. and Owens, J. (2002) Sleep loss and fatigue in residency training. JAMA: The Journal of the American Medical Association, 288, 1116-1124. http://dx.doi.org/10.1001/jama.288.9.1116
 Lima, P., Medeiros, A. and Araujo, J. (2002) Sleep-wake pattern of medical students: early versus late class starting time. Brazilian Journal of Medical and Biological Research, 35, 1373-1377. http://dx.doi.org/10.1590/S0100-879X2002001100016
 Sherina, M., Rampal, L. and Kaneson, N. (2004) Psychological stress among undergraduate medical students. Medical Journal of Malaysia, 59, 207-211.
 Fallone, G., Acebo, C., Seifer, R. and Carskadon, M.A. (2005) Experimental restriction of sleep opportunity in children: effects on teacher ratings. Sleep-New York Then Westchester, 28, 1561.
 Johns, M.W. (1975) Factor analysis of subjectively reported sleep habits, and the nature of insomnia. Psychological Medicine, 5, 83-88.
 Buboltz, W.C., Jr., Brown, F. and Soper, B. (2001) Sleep habits and patterns of college students: A preliminary study. The Journal of American College Health, 50, 131135.
 Caldwell, K., Harrison, M., Adams, M., Quin, R.H. and Greeson, J. (2010) Developing mindfulness in college students through movement-based courses: Effects on self-regulatory self-efficacy, mood, stress, and sleep quality. Journal of American College Health, 58, 433-442. http://dx.doi.org/10.1080/07448480903540481
 Thomas, C.B. and Pederson, L.A. (1963) Psychobiological studies. II. Sleep habits of healthy young adults with observations on levels of cholesterol and circulating eosinophils. Journal of Chronic Diseases, 16, 1099-1114.
 Lowry, M., Dean, K. and Manders, K. (2010) The link between sleep quantity and academic performance for the college student.
 Johns, M.W., Bruce, D.W. and Masterton, J.P. (1974) Psychological correlates of sleep habits reported by healthy young adults. British Journal of Medical Psychology, 47, 181-187.