Retno Wahyuningrum, et al. “Screening of Potential Free Radicals Scavenger and Antibacterial Activities of Purwoceng (Pimpinella Alpina Molk)”. Tropical Life Sciences Research, vol. 27, no. Supp. 1, Nov. 2016, pp. 161–166, https://doi.org/10.21315/tlsr2016.27.3.22.