Maliphan, S., S. Srisuantang, and V. Yamtim. “Knowledge Space and Modifying a Mode of Agricultural Production Among the Karen Communities in Omkoi District, Chiang Mai Province”. Kasetsart Journal of Social Sciences, vol. 41, no. 3, Dec. 2020, pp. 469–474, https://so04.tci-thaijo.org/index.php/kjss/article/view/247510.