Jadhav Poonam, Jagtap Bhakti, Prof.Dr.S.S.Patil, Bhadange Tejaswini. 2017. “Self Powered Sensor Based Environmental Bridge Condition Monitoring System Using Gsm”. International Journal of Engineering and Computer Science 4 (03). india. http://ijecs.in/index.php/ijecs/article/view/1081.