1. Early british patent grants;Gomme;Nature,1927
2. Anonymous. Utynam's Heirs: Introducing Utynam. Managing Intellectual Property Magazine April (2005). http://www.managingip.com/IssueArticle/1255092/Archive/Utynams-Heirs.html - Web access on May 13, 2016.
3. Glasses and the Vitreous State. Cambridge Solid State Science Series;Zarzycki,1991
4. The Glass Bathyscaphe: How Glass Changed the World;Macfarlane,2003
5. The origin of patents;Frumkin;J. Pat. Off. Soc.,1945