Devakate Atul Balaso, Londhe Sarita Dhanaji, Patil Dipali Netaji. “Automatic College Bell Using Raspberry-Pi”. International Journal of Emerging Trends in Science and Technology 3, no. 06 (June 30, 2016): 4086-4089. Accessed July 1, 2024. https://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1091.