https://www.slideshare.net/ManojKumar1530/attendance-management-system-project-report
https://www.ijser.org/researchpaper/Student-attendance-software.pdf
//https://www.docsity.com/en/student-attendance-system/4232244/
http://services.lovelycoding.org/attendence-management-system/
https://www.phptpoint.com/online-attendance-management-system/