Chaitanya, K. S. K., N. G. S, K. A. G, and S. N. “RFID Aided Automatic Billing Trolley System”. Perspectives in Communication, Embedded-Systems and Signal-Processing - PiCES, vol. 2, no. 6, Oct. 2018, pp. 131-5, http://pices-journal.com/ojs/index.php/pices/article/view/104.