GREGÓRIO LOPES painting workshop: characterization by X-ray based techniques. Analysis by EDXRF, µ-XRD and SEM-EDS - Antunes, V; Candeias, A; Oliveira, MJ; Manso, M; Seruya, AI; Coroado, J; Dias, L; Mirao, J; Longelin, S; Serrão, V (2014)