"Quantifying non-hardware balance of system costs for photovoltaic installations in the United States using a combined annual expenditure-labor hour productivity approach." 2012 38th IEEE Photovoltaic Specialists Conference. Austin, TX, USA: IEEE, 2012. 001762 - 001767..
"Tracking US photovoltaic system prices 1998-2012: a rapidly changing market." Progress in Photovoltaics: Research and Applications (2014) n/a - n/a..
"Photovoltaic System Pricing Trends: Historical, Recent, and Near-Term Projections - 2014 Edition." 2014..
Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results. 2012. LBNL-5963E..
Comparing Photovoltaic (PV) Costs and Deployment Drivers in the Japanese and U.S. Residential and Commercial Markets. National Renewable Energy Laboratory (NREL), 2014..
Letting the Sun Shine on Solar Costs: An Empirical Investigation of Photovoltaic Cost Trends in California. Berkeley: LBNL, 2006. LBNL-59282..