Truong, Do Minh, Nguyen Thi Bich Thu, and Le Thanh Nghi. 2012. “Accumulation and Variation of Rosmarinic Acid Content in Orthosiphon Stamineus Benth. Based on Phenological Stages”. Academia Journal of Biology 32 (3):65-71. https://doi.org/10.15625/0866-7160/v32n3.709.