1. 2006–2009 Triennium Work Report;International Gas Union,2009
2. Utility-scale storage of renewable energy;Schaber;The Electricity J,2004
3. Technical and economic assessment of storage technologies for power-supply grids;Meiwes;Acta Polytechnica,2009
4. Overview of geologic storage of natural gas with an emphasis on assessing the feasibility of storing hydrogen;Lord,2009
5. Large-scale hydrogen underground storage for securing future energy supplies;Crotogino,2010