Susianti, Susianti, et al. “THE CYTOTOXIC EFFECTS OF PURPLE NUTSEDGE (Cyperus Rotundus L.) TUBER ESSENTIAL OIL ON THE HELA CERVICAL CANCER CELL LINE”. Pakistan Journal of Biotechnology, vol. 15, no. 1, Mar. 2018, pp. 77-81, https://pjbt.org/index.php/pjbt/article/view/110.