1. Britain's gas grid to be ready to deliver hydrogen across the country from 2023, energy networks announce;Networks Association,2022
2. Pioneering the safe use of blended hydrogen in gas networks to reduce carbon emissions;HyDeploy,2022
3. Hydrogen europe clean hydrogen monitor;Europe,2020
4. European hydrogen Backbone;European Hydrogen Backbone Maps,2022
5. International organization for standardization;ISO 14687:2019 Hydrogen fuel quality — Product specification,2019