Hooi, Yew Kwang, Khairul Shafee Kalid, and Serdarmammet Tachmammedov. “MULTI-FACTOR ATTENDANCE AUTHENTICATION SYSTEM”. International Journal of Software Engineering and Computer Systems 4, no. 2 (November 7, 2018): 62–79. Accessed April 18, 2024. https://journal.ump.edu.my/ijsecs/article/view/705.