Devakate Atul Balaso, Londhe Sarita Dhanaji, Patil Dipali Netaji. (2016). Automatic College Bell Using Raspberry-Pi. International Journal of Emerging Trends in Science and Technology, 3(06), 4086-4089. Retrieved from http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1091