Non-invasive evidence of mercury soaps in painted miniatures on ivorySilvia Garrappa, Petr Bezdička, Silvie Švarcová, Janka Hradilová, Michal Pech and David HradilEur. Phys. J. Plus, 138 3 (2023) 219DOI: https://doi.org/10.1140/epjp/s13360-023-03847-z