Itoh, D., Kasuya, T., Wada, M. and Gotoh, S. 2010. Glow discharge period at the ignition operation of a high-intensity discharge lamp. Proceedings of the Samahang Pisika ng Pilipinas, 28(1), SPP-2010-1C-06. URL: https://proceedings.spp-online.org/article/view/SPP-2010-1C-06.