1. Christopher Allen. 2016. The Path to Self-Sovereign Identity. http://www.lifewithalacrity.com/2016/04/the-path-to-self-soverereign-identity.html Christopher Allen. 2016. The Path to Self-Sovereign Identity. http://www.lifewithalacrity.com/2016/04/the-path-to-self-soverereign-identity.html
2. Arthur Brock Kaliya Hamlin Grace Rachmany and Jakub Lanc. 2019. Reputation Interpretation. https://github.com/WebOfTrustInfo/rwot9-prague/blob/master/final-documents/reputation-interpretation.pdf Arthur Brock Kaliya Hamlin Grace Rachmany and Jakub Lanc. 2019. Reputation Interpretation. https://github.com/WebOfTrustInfo/rwot9-prague/blob/master/final-documents/reputation-interpretation.pdf
3. SPROOF: A Platform for Issuing and Verifying Documents in a Public Blockchain
4. Regulation (EU) No 910/2014 of the European Parliament and of the Council of 23 July 2014 on electronic identification and trust services for electronic transactions in the internal market and repealing Directive 1999/93/EC;Council of the European Union.;Official Journal of the European Union,2014