Sangthongwattanakul, P., C. Waisurasingha, and S. Polpoon. “Utilization of Multi-Temporal Landsat Imagery for Analyzing Land Use/Cover Changes and Urban Expansion of Nakhon Rachasima City”. Engineering and Applied Science Research, vol. 41, no. 1, Sept. 2014, pp. 127-35, https://ph01.tci-thaijo.org/index.php/easr/article/view/21772.