Abd Halim, M. R., H. Mahdin, and S. S. Yaacob. “Web Transcript Verification Using Check Digit As Secure Number”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 2-4, June 2017, pp. 101-5, https://jtec.utem.edu.my/jtec/article/view/2369.