European Business - Facts and figures, 2009 edition, s. 328. Luxemburg: Eurostat, European Communities, 2009. ISSN 1830-8147 Teoksen verkkoversio (pdf) (viitattu 23.4.2010). (englanniksi)
Zervos, Arthouros & Kjaer, Christian & Azau, Sarah & Scola, Julian & Quesada, Jesus & Bianchin, Raffaella: Pure Power (pdf) Wind energy targets for 2020 and 2030. 2009. Viitattu 11.02.2018.
Zervos, Arthouros & Kjaer, Christian & Azau, Sarah & Scola, Julian & Quesada, Jesus & Bianchin, Raffaella: Pure Power (pdf) (W/asukas s. 27) Wind energy targets for 2020 and 2030. 2009. Viitattu 11.02.2018.
[tt_news=575&tx_ttnews[backPid]=1&cHash=d58584a791 New energy and climate package for Europe: The European Commission leads the way towards a massive expansion of wind power EWEA 23.1.2008]