1. M.G. Mauk, R.E. Sims, and R.B. Hall, AIP Conf. Proc., 404(1) (1997), pp. 21–28.
2. B. Alpert, “Nightfall Comes to Solar Land,” Barrons On Line (30 March 2009), http://online.barrons.com/article/SB)23820188149562545.html .
3. RBC Capital Markets Report—RBC’s Daily Snapshot, Global Clean Energy Directions (28 May 2009).
4. A. Feltrin and A. Freundlich, Renewable Energy, 33(2) (2008), pp. 180–185.
5. W. Hoffmann, “Toward an Effective European Industrial Policy for Photovoltaics” (Paper presented at 20th EPIA AGM, Athens, Greece, 7–8 May 2004).