Guerrero, R. and Daza, M.R. 1999. Multiple storage holograms in Bi12SiO20 with dual-wavelength recording and readout. Proceedings of the Samahang Pisika ng Pilipinas, 17(1), SPP-1999-LP-04. URL: https://proceedings.spp-online.org/article/view/SPP-1999-LP-04.