1. Karl Hesse and Ewald Schindbeck. Feedstock for the photovoltaic industry, 2rd Solar Silicon Conference. Munich, Germany; April 11 2005.
2. Peter K, Enbakk E, Friestad K, et al. Investigation of multicrystalline silicon solar cells from solar grade feedstock, 20th European PV Conference and Exhibition in Barcelona; June 2005.
3. Preparation of pure silicon by electrowinning a Bytownite-Cryolite melt;Stubergh;Metallurgical and Materials Transactions B,1996
4. Aud Wærnes, Bart Geerings and Sven Santen, New feedstock materials, 3rd Solar Silicon Conference. Munich, Germany; April 3 2006.
5. Abdulayev, et al., Kazakhstam’s project of receiving the solar grade silicon by carbothermic process on the small power furnaces with further fining, 2rd Solar Silicon Conference. Munich, Germany; April 11 2005.