Watechagit, S., R. Panduang, N. Prommakorn, P. Siriput, Y. Achawangkul, and B. Chullabodhi. “Development of the on-demand fuel injection system for a light truck using the hydrogen enriched compressed natural gas (HCNG) fuel”. Engineering and Applied Science Research, vol. 41, no. 2, Sept. 2014, pp. 213-20, https://ph01.tci-thaijo.org/index.php/easr/article/view/21787.