1. Howley M, Cammish N, Ó Gallachóir B. Energy statistics 1990–2006: 2007 Report. Sustainable Energy Ireland; December 2007.
2. Howley M, Cammish N, Ó Gallachóir B. Energy in transport 2007 Report. Sustainable Energy Ireland; December 2007.
3. Directive 2003/30/EC of the European Paliament and of the Council of 8 May 2003 on the promotion of the use of biofuels or other renewable fuels for transport. Official Journal of the European Parliament L 123/42; May 2003.
4. Department of Communications, Marine and Natural Resources. Government White Paper: Delivering a Sustainable Energy Future for Ireland. March 2007. .
5. Department of Communications, Marine and Natural Resources. Report on measures taken to promote the use of biofuels or other renewable fuels to replace diesel or petrol: Compliance with Directive 2003/30/EC (Article 4). July 2005. .