Chianpian, C.J.M., Abel, J.K.D. and Dungao, J. 2013. Gamma-irradiation effects on the antioxidant properties and caffeine content of Coffea liberica beans from Lipa, Batangas. Proceedings of the Samahang Pisika ng Pilipinas, 31(1), SPP2013-PB-31. URL: https://proceedings.spp-online.org/article/view/SPP2013-PB-31.