Debono, Miguel, Cyrus Ghobadi, Amin Rostami-Hodjegan, Hiep Huatan, Michael J. Campbell, John Newell-Price, Ken Darzy, Deborah P. Merke, Wiebke Arlt, and Richard J. Ross. 2009. “Modified-release hydrocortisone to provide circadian cortisol profiles.” The Journal of Clinical Endocrinology and Metabolism
94 (5): 1548–54.
Drake, Christopher, Timothy Roehrs, John Shambroom, and Thomas Roth. 2013. “Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed.” Journal of clinical sleep medicine: JCSM: official publication of the American Academy of Sleep Medicine
9 (11): 1195–1200.
Foster, Russell G., and Katharina Wulff. 2005. “The Rhythm of Rest and Excess.” Nature Reviews Neuroscience
6 (5): 407–14.
Fries, Eva, Lucia Dettenborn, and Clemens Kirschbaum. 2009. “The cortisol awakening response (CAR): facts and future directions.” International Journal of Psychophysiology: Official Journal of the International Organization of Psychophysiology
72 (1): 67–73.
Gomes, Ana Allen, José Tavares, and Maria Helena P. de Azevedo. 2011. “Sleep and Academic Performance in Undergraduates: A Multi-Measure, Multi-Predictor Approach.” Chronobiology International
28 (9): 786–801.
Guzey, Alexey. 2022. “Theses on Sleep.” Guzey.com
Lovallo, William R., Thomas L. Whitsett, Mustafa al’Absi, Bong Hee Sung, Andrea S. Vincent, and Michael F. Wilson. 2005. “Caffeine Stimulation of Cortisol Secretion Across the Waking Hours in Relation to Caffeine Intake Levels.” Psychosomatic Medicine
67 (5): 734–39.