1. Workshop “Silicon for PV Applications”, Roadmap Meeting, 19 March 2002.
2. Feedstock for the Photovoltaic Industry, Second Solar Silicon Conference;Hesse,2005
3. Solar Grade Silicon Production, Third Solar Silicon Conference;Oda,2006
4. Development of a New Process for Cost Effective Solar Grade Silicon from Silane, 19th EPVSEC;Müller,2004
5. New Process for Cost Effective Solar Grade Silicon from Silane, 20th EPVSEC;Müller,2005