Characterization of medieval-like glass alteration layers by laser spectroscopy and nonlinear optical microscopyMohamed Oujja, Teresa Palomar, Marina Martínez-Weinbaum, Sagrario Martínez-Ramírez and Marta CastillejoEur. Phys. J. Plus, 136 8 (2021) 859DOI: https://doi.org/10.1140/epjp/s13360-021-01834-w