Trong Bien, Tra, AND 		Thi Lan Phuong, Bui.
" Development and Validation of a HPLC Method  of Quantification of Caffeine and EGCG in Green Tea (Camellia sinensis L.) Extract" <em>VNU Journal of Science: Medical and Pharmaceutical Sciences</em> [Online], Volume 36 Number 3 (25 September 2020)