E. Govinda Kumar, K. L. Divyaprabhu, M.A. Rangini, S. Vignesh, N.B. Shyam Narendran. (2020). Bus Detection System for Blind People using GSM Technology. International Journal of Advanced Science and Technology, 29(7), 174 - 178. Retrieved from http://sersc.org/journals/index.php/IJAST/article/view/13204