European Energy Futures 2030: Technology and Social Visions from the European Energy Delphi Survey by Daniela Velte, Oliver Nielsen, Anna Oniszk-Poplawska, Juan Pedro Lopez Araguas, Lukasz Jaworski, Wolfram Jorss, Augusto Ninni, Timon Wehnert, Birte Holst Jorgensen, Oliviero Bernardini (Hardback, 2007)