I. E. Lister, R. Zein, E. Yerizal, E. Fachrial, and Y. Manjang, “Protective Effect of Aqueous Leaves Antidote of Piper crocatum Against Lead Induced Oxidative Stress in Mice Liver”, ajc, vol. 28, no. 11, pp. 2499–2501, Aug. 2016.