1. Department of Optoelectronic Methods and Techniques for Artwork Restoration and Conservation, National Institute of Research and Development for Optoelectronics INOE 2000, 077125 Magurele, Romania
2. Saint Ierarch Calinic of Cernica Conservation and Restoration Center of the Valcea Holy Archiepiscopate, One Wood Monastery, 247195 Valcea, Romania
3. Department of Structure of Matter, Earth and Atmospheric Physics and Astrophysics, Faculty of Physics, University of Bucharest, 077125 Magurele, Romania
4. Geological Institute of Romania, 012271 Bucharest, Romania