ไชยา ส.; วงศฺธนวสุ ศ. Cautions of Digital Signature Application for a Tuition Fee Receipt, Khon Kaen University. Local Administration Journal, [S. l.], v. 11, n. 1, p. 163–180, 2018. Disponível em: https://so04.tci-thaijo.org/index.php/colakkujournals/article/view/116861. Acesso em: 26 apr. 2025.