Azhar, Shahirah, and Nor Bakiah Abd Warif. 2023. “A Secure Dental Appointment System With One-Time Password Verification and Dual Authentication for Klinik Pergigian Sharifah ”. Applied Information Technology And Computer Science 4 (2): 283-301. https://penerbit.uthm.edu.my/periodicals/index.php/aitcs/article/view/12295.