Surface-enhanced Raman spectroscopy for madder lake detection in painting layersS. Innocenti, M. Ricci, D. Quintero Balbas, R. Fontana, J. Striova and M. BecucciEur. Phys. J. Plus, 138 5 (2023) 381DOI: https://doi.org/10.1140/epjp/s13360-023-03964-9