Raghav S., Jayahariharan R., Yogesh M., and Ms. Rajalakshmi Gurusamy. “RFID Attendance System Using ESP8266”. Journal of RF and Microwave Communication Technologies, Apr. 2024, pp. 16-21, https://www.matjournals.net/engineering/index.php/JoRFMCT/article/view/336.