Kuncoro, H.; Farabi, K.; Rijai, L.; Julaeha, E.; Supratman, U.; Shiono, Y. Flavonoid Compounds from the Herb of Krokot (Lygodium Microphyllum) and Their Antioxidant Activity Against DPPH. J. Math. Fund. Sci. 2018, 50, 192-202.