Surface modification processes on European Union bronze reference materials for analytical studies of cultural artefactsT. Beldjoudi, F. Bardet, N. Lacoudre, S. Andrieu, A. Adriaens, I. Constantinides and P. BrunellaRev. Met. Paris, 98 9 (2001) 803-808DOI: https://doi.org/10.1051/metal:2001126