S. Sathyavathi, R. Dhaaraani, S. Kavitha, G. Prema Arokia Mary. “Detection of Fraudulence Activity Using Smart Cards”. International Journal of Advanced Science and Technology, Vol. 29, no. 06, May 2020, pp. 4344 -52, http://sersc.org/journals/index.php/IJAST/article/view/18590.