Saravanakumar Veerappan. “A Comparative Study of NFC and UWB Technologies for Secure Contactless Payment Systems”. National Journal of RF Circuits and Wireless Systems 1, no. 1 (August 19, 2024): 49–57. Accessed January 23, 2026. https://ecejournals.in/index.php/RFMW/article/view/230.