Mallari, A.K.B., Soriano, M.N. and Saloma, C.A. 2003. Simulating color appearance change due to interreflections in a spherical concavity under two illuminants. Proceedings of the Samahang Pisika ng Pilipinas, 21(1), SPP-2003-2A-02. URL: https://proceedings.spp-online.org/article/view/SPP-2003-2A-02.