1. Danlel Balageas, Introduction to structural health monitoring, 2015.
2. The location of defects in structures from measurements of natural frequencies;Cawley;J. Strain Anal. Eng. Des.,1979
3. Martina Ivaskova, et al., Air pollution as an important factor in construction materials deterioration in Slovak Republic, in: 7th Scientific-Technical Conference Material Problems in Civil Engineering, 2015.
4. P.C. Chang, S.C. Liu, Nondestructive Evaluation of Civil Infrastructures. submitted for publication to ASCE Special Edition on Nondestructive Evaluation, 2002.
5. Code Requirements for Determining Fire Resistance of Concrete and Masonry Construction Assemblies;ACI,2007