1. Hawksworth S, Spagni D, Newsholme G. Residential and small stationary hydrogen energy systems: risks and opportunities. In: Proceedings of VGR conference on risk assessment and management in civil and industrial settlements, Palace de Congress, Pisa, Italy, 17–19 October, Paper 700220.pdf; 2006.
2. Installation Permitting Guidance for Hydrogen and Fuel Cells Stationary Applications (HYPER). http://www.hyperproject.eu/.
3. Kessler A, Ehrhardt W, Langer G. ‘Hydrogen detection: visualisation of hydrogen using non invasive optical Schlieren technique BOS’. In: International conference of hydrogen safety, Pisa, Italy, 7–10 September 2005, paper 110127; 2005.