1. W3C. (2021). DID specification registries. https://w3c.github.io/did-spec-registries/
2. Hyperledger
3. Economics and Identity*
4. Alamango, Y. (2021). Healthcare decentralized identity case study.https://www.techuk.org/resource/healthcare-decentralised-identity-case-study-nhsx.html
5. Allen, C. (2016). The path to self-sovereign identity. Life with Alacrity.http://www.lifewithalacrity.com/2016/04/the-path-to-self-soverereign-identity.html