1. DIRECTIVE 2004/8/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 11 February 2004 on the Promotion of Cogeneration Based on a Useful Heat Demand in the Internal Energy Market and Amending Directive 92/42/EEC.
2. The energy Charter Treaty and related documents (A legal framework for international energy cooperation),2013
3. COUNCIL RESOLUTION of 18 December 1997 on a Community Strategy to Promote Combined Heat and Power (98/C 4/01).
4. GREEN PAPER: towards a European strategy for the security of energy supply,2013
5. COMMISSION DECISION of 19 November 2008 Establishing Detailed Guidelines for the Implementation and Application of Annex II to Directive 2004/8/EC of the European Parliament and of the Council (notified under document number C(2008) 7294) (Text with EEA relevance) (2008/952/EC).