Tonthongkam, K. ., and K. Phromchana. “The study of human facial expressions. To develop the design process for pottery handicrafts”. Journal of Bansomdej Engineering and Industrial Technology, vol. 3, no. 1, June 2022, pp. 62-80, https://ph04.tci-thaijo.org/index.php/JEITB/article/view/4041.