Suntornmeth, P., P. Pisjan, and W. Bualek. “Information Retrieval System of the Tree by Using QR Code Technology”. RMUTL Journal of Business Administration and Liberal Arts, vol. 5, no. 1, June 2017, pp. 1-13, https://so05.tci-thaijo.org/index.php/balajhss/article/view/94693.