1. Demand Pull And Technological Flows Within Innovation Systems: The Intra-European Evidence;Antonelli;Dipartimento di Economia “Cognetti de Martiis”, Working paper No. 03/,2013
2. Bahar, H. and J. Sauvage (2013), “Cross-Border Trade in Electricity and the Development of Renewables-Based Electric Power: Lessons from Europe”, OECD Trade and Environment Working Papers, 2013/02, OECD Publishing. http://dx.doi.org/10.1787/5k4869cdwnzr-en.
3. A New Wave in Green Energy Fraud; Frauders are Learning it Pays to be Green;Bohn;Fraud Magazine,2010
4. BMU (German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety). (2009). GreenTech Made in Germany 2.0: Environmental Technology Atlas for Germany. Berlin: BMU.
5. Cerquera, Daniel; Klein, Gordon J. (2013) : Intermediate input markets, ICT and innovation in Germany: A firm level analysis, ZEW Discussion Paper, No. 13-013.