1. Energy policy review,2020
2. Medium-term gas market report,2016
3. Security of European Natural Gas Supplies. The impact of import dependence and liberalization;Stern,2002
4. Short-term European outlook,2017
5. Directive 2003/55/EC of the European Parliament and of the Council of 26 June 2003 concerning common rules for the internal market in natural gas and repealing Directive 98/30/EC,2003