1. G.M. Ingo, G. Bultrini, E. Lo Piccolo, L.-I. Manfredi: Archaeometry 39, 59 (1997)
2. D.A. Scott: J. Am. Inst. Conserv. 29, 193 (1990)
3. D.A. Scott: Metallography and Microstructure of Ancient and Historic Metals (The Getty Conservation Institute, Paul Getty Museum, Malibu, CA 1991)
4. G.M. Ingo, G. Bultrini, D. Attanasio: Archaeometry 43, 529 (2001)
5. G.M. Ingo, L.-I. Manfredi, G. Bultrini, G. Chiozzini, S. Caroli: in Proc. XII Int. Numismatischer Kongr., ed. by B. Kluge, B. Weisser (Staatliche Museen zu Berlin, Berlin 2000) p. 306