Ellamla H.R.; Staffell, I; Bujlo, P; Pollet, BG; Pasupathi, S. Current status of fuel cell based combined heat and power systems for residential sector. Journal of Power Sources. 28 May 2015, 293 (C): 312–328. doi:10.1016/j.jpowsour.2015.05.050.
Renewable Energy Policy Mechanisms by Paul Gipe互联网档案馆的存檔，存档日期May 10, 2012，.(1.3MB) Lauber, V. (2004). "REFIT and RPS: Options for a harmonized Community framework," Energy Policy, Vol. 32, Issue 12, pp.1405–1414. Lauber, V. (2008). "Certificate Trading – Part of the Solution or Part of the Problem?"
Ljubljana Conference on the Future of GHG Emissions Trading in the EU, March 2008. Salzburg, Austria: University of Salzburg. Retrieved 16 March 2009 at: www.uni-salzburg.at/politikwissenschaft/lauber
Renewable Energy Policy Mechanisms by Paul Gipe互联网档案馆的存檔，存档日期May 10, 2012，.(1.3MB) Lauber, V. (2004). "REFIT and RPS: Options for a harmonized Community framework," Energy Policy, Vol. 32, Issue 12, pp.1405–1414. Lauber, V. (2008). "Certificate Trading – Part of the Solution or Part of the Problem?"
Ljubljana Conference on the Future of GHG Emissions Trading in the EU, March 2008. Salzburg, Austria: University of Salzburg. Retrieved 16 March 2009 at: www.uni-salzburg.at/politikwissenschaft/lauber
