Determination of phenolic and antioxidant properties in tea and spent tea under various extraction method and determination of catechins, caffeine and gallic acid by HPLC
Universiti Sains Malaysia พ.ศ. 2558
Short communication: Caffeine and total polyphenol contents of market tea cultivated and processed in bangladesh
พ.ศ. 2556
Simultaneous determination of caffeine and 8 catechins in oolong teas produced in Thailand