1. The unconventional hydrocarbon resources of Britain’s onshore basins – shale gas;DECC,2012
2. Cuadrilla Resources Ltd. Energy security, ; 2011 [cited March 2013].
3. IGas Energy plc. Shale gas in place in IGas’ North West licences of up to ca. 170 Tcf, ; 3 June 2013 [cited 2013].
4. The Carboniferous Bowland Shale gas study: geology and resource estimation;Andrews,2013
5. DECC. Energy statistics, ; [cited October 2013].