1. Abbe MB (2013) An Archaeo logical description of the Richmond Caligula. In: Frischer B, Schertz P (eds) Caligula 3-D: Man, Myth, Emperor. Proceedings of the international symposium on the Richmond Caligula. Virtual World Heritage Sculpture Laboratory; Brill Press, Leiden
2. Akridge DG, Benoit PH (2001) Luminescence properties of chert and some archaeological applications. J Archaeol Sci 28:143–151
3. Allen DF (1980) The coins of the ancient Celts. In: Nash D (ed) Edinburgh University Press
4. Ambroz JA, Glasscock MD, Skinner CE (2001) Chemical differentation of obsidian within the Glass Buttes complex. J Archaeol Sci 28:741–746
5. Arnold DE, Neff H, Bishop RL, Glascock MD (1999) Testing interpretive assumptions of neutron activation analysis. In: Chilton ES (ed) Material meanings. The University of Utah Press, Salt Lake City