A. E. Z. Hasan, D. Mangunwidjaja, T. C. Sunarti, O. Suparno, and A. Setiyono, “INVESTIGATING THE ANTIOXIDANT AND ANTICYTOTOXIC ACTIVITIES OF PROPOLIS COLLECTED FROM FIVE REGIONS OF INDONESIA AND THEIR ABILITIES TO INDUCE APOPTOSIS”, Emir J Food Agric, vol. 26, no. 5, pp. 390–398, Jan. 2014.