1. Al Gore: Access America: Reengineering Through Information Technology - Report of the National Performance Review and the Government Information Technology Services Board. Vice President of the United States (1997)
2. Andersen, R.: The panopticon is already here. The Atlantic September (2020)
3. Ansper, A.: E-State From a Data Security Perspective. Tallinn University of Technology, Faculty of Systems Engineering, Department of Automation, Tallinn (2001)
4. Lecture Notes in Computer Science;A Ansper,2013
5. Antonopoulos, A.M.: Mastering Bitcoin: Programming the Open Blockchain. O’Reilly (2017)