2013
Feldman, David,
Galen L Barbose,
Robert Margolis,
Naïm R Darghouth,
Ted James,
Samantha Weaver,
Alan Goodrich, and
Ryan H Wiser. "
Photovoltaic System Pricing Trends: Historical, Recent, and Near-Term Projections - 2013 Edition." 2013.
2012