1. Gems from archaeological excavations at Rome (Crypta Balbi);Andreozzi;Zeischrift der Deutschen Gemmologischen Gesellschaft,1996
2. An analytical study of the relationship between the Portland vase and other Roman cameo glasses;Bimson;J. Glass Stud.,1983
3. A red opaque glass from Sardis and some thoughts on red opaques in general;Brill;J. Glass Stud.,1988
4. The opaque red glass of Celtic enamels from continental Europe;Brun;Archaeometry,1992