Batac, R.C., Pastor, M.G., Arciaga, M.E., Bantang, J.Y. and Monterola, C.P. 2007. Cellular automata model of repose angle formation of a binary granular mixture. Proceedings of the Samahang Pisika ng Pilipinas, 25(1), SPP-2007-3F-02. URL: https://proceedings.spp-online.org/article/view/SPP-2007-3F-02.