1. European Commission (n.d.) Commissioner (2019–2024): Mariya Gabriel. Available at https://ec.europa.eu/commission/commissioners/2019-2024/gabriel_en.
2. Fuel taxes: An important instrument for climate policy
3. Citigroup (2016) Disruptive innovations IV. Ten more things to stop and think about. Citi GPS: Global Perspectives & Solutions. Available at https://www.citivelocity.com/citigps/disruptive-innovations-iv/.
4. The Housing Market Impacts of Shale Gas Development
5. The Economist (2019) Red Moon Rising – will China dominate science? The Economist, January 12. Available at https://www.economist.com/leaders/2019/01/12/how-china-could-dominate-science.