1. Council E (2014) 2030 Climate and energy policy framework. Belgium, Brussels
2. European Commission. (2012). Smart ICT for energy efficiency. Shaping Europe’s Digital Future Projects. Cyprus
3. Alsaleh M, Abdul-Rahim AS, Mohd-Shahwahid HO (2017) Determinants of technical efficiency in the bioenergy industry in the EU28 region. Renew Sustain Energy Rev 78(2017):1331–1349
4. Huber GW (2007) Breaking the chemical and engineering barriers to lignocellulosic biofuels: a research roadmap for making lignocellulosic biofuels a practical reality. American Chemical Society Workshop, Washington, DC
5. Chung JN (2013) Grand challenges in bioenergy and biofuel research: engineering and technology development, environmental impact, and sustainability. Front Energ Res 2013:1–4