M. T. Islam, M. K. Nasir, M. M. Hasan, M. G. G. Faruque, M. S. Hossain, and M. M. Azad "Blockchain-Based Decentralized Digital Self-Sovereign Identity Wallet for Secure Transaction", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 977–983, 2021, doi: 10.25046/aj0602112.