H. B. Sembiring, T. Barus, L. Marpaung, and P. Simanjuntak, “Isolation and Characterization of Flavonoids Isolated from Leaves of Benalu Jeruk (Scurrula fusca G. Don) as Antioxidant”, ajc, vol. 29, no. 8, pp. 1743–1745, Jun. 2017.