H. Fukushige, Y. Fukuda, M. Tanaka, K. Inami, K. Wada, Y. Tsumura, M. Kondo, T. Harada, T. Wakamura, and T. Morita, «Effects of Tryptophan-rich Breakfast and Light Exposure during the Daytime on Melatonin Secretion at Night». Journal of Physiological Anthropology 33 (Nov. 2014): 33.
