Venkateswararao, Kuna, L Gurusarathy, and Akepati Sankar Reddy. “Online E-Tollgate Fee Collection Using QRcode”. International Journal of Engineering & Technology 7, no. 1.7 (February 5, 2018): 62–64. Accessed May 6, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/9574.