Inhibitory Effects of Sangketan (Achyranthes aspera L.) Roots Extract on Arginase Activity and Determination of Its Total Phenolic and Flavonoid Contents, Rahmawati, Dieah Siti, Elya Berna, and Noviani Arikadia , Pharmacognosy Journal, October 2019, Volume 11, Issue 6, p.1231-1234, (2019)