Fidrianny, I., A. Alvina, and Sukrasno. “ANTIOXIDANT CAPACITIES FROM DIFFERENT POLARITIES EXTRACTSOF THREE KINDS GINGERUSINGDPPH, FRAPASSAYS ANDCORRELATION WITH PHENOLIC, FLAVONOID, CAROTENOID CONTENT”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 6, no. 7, July 2014, pp. 521-5, https://journals.innovareacademics.in/index.php/ijpps/article/view/1754.