1. W.E.S. Tumer, “Studies in Ancient Glass and Glass-Making Processes. Part III: The Chronology of Glass-Making Constituents,” J. Soc. of Glass Technology, 40 (1956), pp. 39T–52T; J. Henderson, “The Raw Materials of Early Glass Production,” Oxford J. of Archaeology, 4 (3) (1985), pp. 177–190.
2. J.D. Bateson and R.E.M. Hedges, “The Scientific Analysis of a Group of Roman-Age Enamelled Brooches,” Archaeometry, 17 (2) (1975), pp. 177–190.
3. J. Henderson, “The Chemical and Structural Characteristics of Roman Enamels from Britain,” Archaeometry ′90, (Plenum Press, Oxford) pp. 285-294.
4. R.H. Brill, “The Scientific Investigation of Ancient Glasses,” Proc. of the VIIIth International Congress of Glass, London (Sheffield: Soc. of Glass Technology, 1967), pp. 47–48; J. Henderson, “The Scientific Analysis of Ancient Glass and Its Archaeological Interpretation,” Scientific Analysis in Archaeology, and Its Interpretation, ed. J. Henderson (Oxford, England: Oxbow Books, 1989), pp. 245–254.
5. J. Henderson, “Electron-Probe Microanalysis of Mixed-Alkali Glasses,” Archaeometry, 30 (1) (1988), pp. 77–91.