1. 1)I. Freestone, N. Meeks, M. Sax, C. Higgitt: Gold Bull, 40, 270 (2007).
2. 2)D. von Kerssenbrock-Krosigk, C. Brain, C. M. o. Glass: Glass of the Alchemists: Lead Crystal-gold Ruby, 1650-1750 (Corning Museum of Glass, 2008).
3. 3)A. Neri: L’arte vetraria distineta in Libri sette (Batti, 1612).
4. 4)N. Schlager, J. Lauer: Science and its times: understanding the social significance of scientific discovery (Gale Group, 2000).
5. 5)J. Ueda, S. Tanabe: J. Am. Ceram. Soc., 93, 3084 (2010).