1. Green tea composition, consumption, and polyphenol chemistry
2. Ministry of Agriculture https://www.maff.go.jp/e/policies/agri/attach/pdf/index‐1.pdf. Accessed 22 July 2020.
3. The Nikkei (a daily newspaper).Mitsubishi Tanabe Pharma Corp. former researcher was found guilty by a poisoning case after consuming the tea mixed with a powerful drug.https://www.nikkei.com/article/DGXNASDG1701R_X10C12A7CC0000/. Accessed 3 March 2020. (in Japanese).
4. The Japan Times.Aska drug arrest highlights rehabilitation shortfalls.https://www.japantimes.co.jp/news/2016/11/29/national/crime‐legal/aska‐drug‐arrest‐highlights‐rehabilitation‐shortfalls/. Accessed 22 July 2020.
5. Forensic Botany