1. Salzberg H.W., From Caveman to Chemist: Circumstances and Achievements (ACS Publications, Washington, D.C., 1991)
2. C. Jacob, HYLE – Int. J. Phil. Chem., 7(1) (2001) 31
3. Peter J. Reynolds, ``The Nature of Experiment in Archeology'', in in honour of John Coles - A F Harding (ed.), Experiment and Design in Archaeology (Oxbow Books, 1999)
4. W. Fischer-Bossert, Chronologie der Didrachmenprägung von Tarent. 510–280 v. Chr. (DAI, Antike Münzen und geschnittene Steine Band 14), pp. xvii+495, pls. 85, map 1. Walter De Gruyter, Berlin 1999
5. G. Giovannelli, S. Natali, B. Bozzini, A. Siciliano, R.Vitale, A. Serra and D. Manno. “A puzzling “mule” coin from the Parabita hoard: A material characterisation”. Cavallino Archaeometry Workshop 2006, Cavallino (Lecce – Italy) – May 22–25, 2006. Submitted. Preprint available at http://www.arxiv.org/abs/cond-mat/0603438