@article { boralvsil2016, author = "Borges, R. and Alves, L and Silva, R and Araujo, M and Candeias, A and Corregidor, V and Valerio, P and Barrulas, Pedro", title = "Investigation of surface silver enrichment in ancient high silver alloys by PIXE, EDXRF, LA-ICP-MS and SEM-EDS", year = "2016" }