V.R.Viswanadh, M, M RameshKumar, and T Chandana. “Verification of Certificates Using Smart Card Technology”. International Journal of Engineering and Technology 7, no. 2.7 (March 18, 2018): 993–996. Accessed May 12, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/11672.