Unno, K., Noda, S., Kawasaki, Y., Yamada, H., Morita, A., Iguchi, K., & Nakamura, Y. (2017). Ingestion of green tea with lowered caffeine improves sleep quality of the elderly via suppression of stress. J Clin Biochem Nutr.

Unno, Keiko, Shigenori Noda, Yohei Kawasaki, Hiroshi Yamada, Akio Morita, Kazuaki Iguchi, i Yoriyuki Nakamura. "Ingestion of Green Tea With Lowered Caffeine Improves Sleep Quality of the Elderly Via Suppression of Stress." J Clin Biochem Nutr 2017.

Unno, Keiko, et al. "Ingestion of Green Tea With Lowered Caffeine Improves Sleep Quality of the Elderly Via Suppression of Stress." J Clin Biochem Nutr 2017.