NARAYANA, D. ., G. . REDDY, K. RAVIKIRAN, MANISH, and NIKHIL. “SMART ATTENDENCE MONITERING SYSTEM”. The Journal of Contemporary Issues in Business and Government, vol. 27, no. 6, Dec. 2021, pp. 1847-52, https://cibgp.com/au/index.php/1323-6903/article/view/2278.