Longjas, A.G., Monterola, C.P., Palima, M.L., Bantang, J.Y. and Saloma, C.A. 2006. Jamming of mixed and homogenous hard spheres in a two-dimensional hopper. Proceedings of the Samahang Pisika ng Pilipinas, 24(1), SPP-2006-2G-04. URL: https://proceedings.spp-online.org/article/view/SPP-2006-2G-04.