Theresa L. Shanahan

Nonentrained Circadian Rhythms of Melatonin in Submariners Scheduled to an 18-Hour Day

David F. Neri, Derk-Jan Dijk, Charles A. Czeisler, 1999, Journal of biological rhythms.

Amplitude Reduction and Phase Shifts of Melatonin, Cortisol and Other Circadian Rhythms after a Gradual Advance of Sleep and Light Exposure in Humans

Derk-Jan Dijk, Diane B. Boivin, Charles A. Czeisler, 2012, PloS one.