1. Council Directive 2004/67/EC of 26 April 2004 concerning measures to safeguard security of natural gas supply.
2. Green Paper, ‘Towards a European strategy for the security of energy supply’, 29 November 2000 (COM (2000) 769 final).
3. Communication from the Commission to the European Parliament and the Council (COM (2002) 488 final) dated 11 September 2002 - ‘The internal market in energy: Coordinated measures on the security of energy supply’.
4. IEA World Energy Investment Outlook 2003 (IEA/OECD, Paris, 2003).
5. Green Paper, ‘Towards a European strategy for the security of energy supply’, 29 November 2000 (COM (2000) 769 final).