Nilsalab, P., S. H. Gheewala, and R. Mungkung. “Water Assessment of Agrofuels Feedstock Cultivation: Methodology Approaches”. Environment and Natural Resources Journal, vol. 10, no. 2, Nov. 2016, pp. 11-20, https://ph02.tci-thaijo.org/index.php/ennrj/article/view/71265.