1. W. Faul, VDI-Matech. EUROMAT, München, Based on estimations from Audi, 1999.
2. Random and Ordered Macropore Formation in p-Type Silicon
3. Nano-sized pore formation in p-type silicon for automotive applications;Konle,2002
4. V.C. Holm Si-Energy, H. Kibbel, Patent filed DaimlerChrysler, 2000.