Figueiredo, E., P. Valério, M. F. Araújo, R. J. C. Silva, and A. M. Monge Soares. "Inclusions and metal composition of ancient copper-based artefacts: A diachronic view by micro-EDXRF and SEM-EDS." X-Ray Spectrometry. 40.5 (2011): 325-332.