1. F. Dross in: Proc. 4th WCPEC, Hawaii, USA, 2006, pp. 1291-1294.
2. I. Romijn in: Proc. 22nd EU PVSEC, Milan, Italy, 2007, pp. 1043-1049.
3. 22.8% efficient silicon solar cell
4. E. van Kerschaver in: Proc. 2nd WCPEC, Vienna, Austria, 1998, pp. 1479-1482.
5. U. Jäger in: Proc. 24th EU PVSEC, Hamburg, Germany, 2009, pp. 1740-1743.