1. Abraham, A.: Self-sovereign identity. Styria. EGIZ.GV.AT (2017)
2. Lecture Notes in Computer Science;E Alkim,2016
3. Angerstein, J.: Serial infrared specification.
http://berk.tc/intercon/irda/IrPHY_1p4.pdf
4. Steinberg, T., Pon, B., Locke, C.: Private-sector digital identity in emerging markets (2019)
5. CryptoGraffiti: Cryptograffiti (2019).
https://cryptograffiti.info/