Saito, K. and Nakamura, Y. (2019) “Roots of Hydroponically Grown Tea (Camellia sinensis) Plants as a Source of a Unique Amino Acid, Theanine”, Advances and Trends in Agricultural Sciences Vol. 1, pp. 60-64. Available at: https://stm1.bookpi.org/index.php/atias-v1/article/view/237 (Accessed: 19June2026).