Cowsigan S P, Sankari R, Sasi kumar P K, Nilaani K, Chandra Prasad V. “Smart Helmet With Gps And Gsm”. International Journal of Advanced Science and Technology, Vol. 29, no. 9s, May 2020, pp. 3815 -20, http://sersc.org/journals/index.php/IJAST/article/view/16622.