Publisher
- Department for the Economy5
- Ricardo Energy & Environment5
- John Wiley & Sons, Inc4
- River Publishers4
- Springer Gabler4
- AECOM3
- Department for Business and Trade3
- Environmental Resources Management3
- Frontier Economics3
- Lexington Books3
- Platts3
- Progressive Energy Limited3
- Royal Society of Chemistry3
- Wiley-VCH3
- [Utility Regulator]3
- CATAGEN2
- Colorado Construction & Engineering2
- Compact Syngas Solutions2
- Competition and Markets Authority2
- Department of Energy & Climate Change2