Flores, A., Sanchez, M.J., Otadoy, R. and Zuidberg, B. 2004. A simple optical experiment to determine the gas constant. Proceedings of the Samahang Pisika ng Pilipinas, 22(1), SPP-2004-1B-03. URL: https://proceedings.spp-online.org/article/view/SPP-2004-1B-03.