1. Allan Consulting Group (2005) Options for development of the Australian gas market—Report to the ministerial counsel on energy standing committee of officials
2. Jain A et al (2011) Natural gas in India—an analysis of policy. Oxford Institute of Energy Studies
3. Baker Institute Study (2005) The geopolitics of natural gas—James A Baker III Institute for public policy of rice university and Program on energy and sustainable development at STANFORD university
4. BP (2015) BP statistical review of world energy. BP retrieved from bp.com/statistical
5. Calliope W (2009) The evolution of gas industry in the UK. International Gas Union (IGU)—gas market integration task force paper