HENDRIYADI BAHTIAR; KAMRAN KHAN. CLASSQR: A SMART AND CONTACTLESS QR CODE ATTENDANCE SYSTEM. International Journal of Data Science and IoT Management System, [S. l.], v. 4, n. 2, p. 10–13, 2025. DOI: 10.64751/. Disponível em: https://ijdim.com/journal/index.php/ijdim/article/view/70. Acesso em: 5 oct. 2025.