Amistoso, J.O., Parañal, P.E., de Villa, V., Natividad, J.B. and Daza, M.R. 1995. Performance characteristics of a sealed-off CO2 laser system. Proceedings of the Samahang Pisika ng Pilipinas, 13(1), SPP-1995-LP-04. URL: https://proceedings.spp-online.org/article/view/SPP-1995-LP-04.