2) Non-Invasive Evaluation of Polymeric Protective Coatings for Metal Surfaces of Cultural Heritage Objects: Comparison of Optical and Electromagnetic Methods in APPLIED SCIENCES-BASELBy: Quintero Balbas D.I., Dal Fovo A., Porcu D., Chaban A., Porcinai S., Fontana R., Striova J. Year: 2022 (IF.: 2.700 Cit.: 4 DOI: 10.3390/app12157532)