Prayukvong, W. “The Technical Coefficient of Reused Inputs in Alternative Agriculture System: A Case Study from Khon Kaen Province, Thailand”. Kasetsart Journal of Social Sciences, vol. 24, no. 1, Jan. 2003, pp. 64-71, https://so04.tci-thaijo.org/index.php/kjss/article/view/243399.