1 CNR-Institute of Heritage Science, C.da S. Loya, 85050, Tito Scalo, Italy. nicola.masini@cnr.it.
2 University of Bari, Bari, Italy.
3 Silesian University of Technology, Gliwice, Poland.
4 CNR-Institute of Methodologies for Environmental Analysis, C.da S. Loya, 85050, Tito Scalo, Italy.
5 ISPRA, Geological Survey of Italy, Rome, Italy.
6 CNR, Nanotech, Lecce, Italy.
7 Peruvian Ministry of Culture-Directorate of Culture of Cusco, Programa de Investigaciones Arqueologicas e Interdisciplinarias en el Santuario Historico de Machupicchu (PIAISHM), Cusco, Peru.
8 CNR-Institute of Heritage Science, C.da S. Loya, 85050, Tito Scalo, Italy.
9 UNESCO Chair at Florence University, Florence, Italy.