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2. Present trends in industrial glass making;Barton,1995
3. A. Roald “Foamed glass – an alternative lightweight and insulating materials” Provided by research in the recycling project at NPRA and projects performed by the Has Group, Norway.
4. “Glass foams: formation, transport properties, and heat, mass, and radiation transfer;Fedorov;Journal of Non-Crystalline Solids,2002
5. Glass & Glass Product Manufacturing Industry,2010