Framework for a DLT Based COVID-19 Passport. - Sarang Chaudhari; Michael Clear; Philip Bradish; Hitesh Tewari (SAI (3), 2021)

CoviChain: A Blockchain Based COVID-19 Vaccination Passport. - Philip Bradish; Sarang Chaudhari; Michael Clear; Hitesh Tewari (FICC (1), 2023)