Energetická efektivita v EU. 

Buchan, D. (2009): Energy and Climate Change: Europe at the Crossroads, 191 - 204. 

Buchan, D.; Keay, M. (2015): Europe´s Long Energy Journey: Towards an Energy Union? 101-116.

Doplňkové zdroje: 

https://ec.europa.eu/energy/en/topics/energy-efficiency