Kunarto, B. et al. 2019. Antioxidant Activity of Melinjo Ketan (Gnetum gnemon L., ‘Ketan’) Seed Extract at Various Ripening Stages and Ethanol Solvent Concentration. International Journal on Advanced Science, Engineering and Information Technology. 9, 4 (Aug. 2019), 1344–1351. DOI:https://doi.org/10.18517/ijaseit.9.4.9376.