1. S. Johnson: The fondness of every man for his profession, The Rambler April 17th (1750)
2. A. MacFarlane, G. Martin: The Glass Bathyscaphe (Profile Books, London 2002)
3. A. Bitard: Les arts et métiers illustrés (Jules Rouff et Cie éditeurs, Paris around 1890)
4. Pliny the Elder, Natural History, Vol. 36
5. W.E.S. Turner: Studies in ancient glasses and glassmaking processes. Part V Raw materials and melting processes, J. Soc. Glass Technol. 8 (1929)