Suriyachay, K., T. Charoenporn, V. Sornlertlamvanich, and N. Kaothanthong. “Enhancement of Character-Level Representation in Bi-LSTM Model for Thai NER”. Science & Technology Asia, Vol. 26, no. 2, June 2021, pp. 61-78, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/230527.