http://www.platts.com/NewsFeatureDetail.aspx?xmlpath=IM.Platts.Content/I...
http://www.renewableenergyworld.com/rea/news/article/2010/03/clearing-re...
http://www.renewablesbiz.com/article/10/03/storing-renewable-energy
http://www.renewableenergyworld.com/rea/news/article/2010/03/energy-stor...
http://www.renewablesbiz.com/article/10/03/wind-farm-pioneer-ties-family...
http://aceee.org/pubs/e102.htm
http://www.eia.doe.gov/cneaf/electricity/epm/epm_sum.html