1. Companies using Hyperledger Fabric. https://101blockchains.com/hyperledger-fabric/
2. The Coq proof assistant. https://coq.inria.fr/
3. A repository for PoS related formal methods. https://github.com/palmskog/pos
4. Software foundations. https://softwarefoundations.cis.upenn.edu/
5. Formalization of transaction flow process of Hyperledger Fabric in Coq (2020). https://github.com/lixm/hf-trans-flow