1. Renewable energy policy network for the 21st century. Renewable energy policies in a time of transition,2018
2. Railway handbook 2016. Energy consumption and CO2 emissions,2016
3. Global energy transformation. A roadmap to 2050,2018
4. National action framework for alternative energy in transport . Market development and deployment of alternative fuels infrastructure,2016
5. An overview of biofuels from energy crops: current status and future prospects;Koçar;Renew Sustain Energy Rev,2013