1. DIN V 18026:2006-06, Surface protection systems for concrete products according to DIN EN 1504-2:2005-01
2. K. Matthies, Thickness Measurement with Ultrasound, (DVS Media GmbH, Berlin, 1998)
3. K. S. Feige Volker, M. Berta, S. Nix, F. Ellrich, J. Jonuscheit and R. Beigang, Berührungslose Mehrlagen-Schichtdickenmessung industrieller Beschichtungen mittels THz-Messtechnik, (2012).
4. DIN EN 15042-2:2006, Thickness measurement of coatings and characterization of surfaces with surface waves - part 2: guide to the thickness measurement of coatings by photothermic method
5. L. D. Favro, X. Han, P.-K. Kuo and R. L. Thomas, “Imaging the early time behavior of reflected thermal wave pulses”, in Thermosense XVII, (Orlando, FL, United States, 1995), pp. 162–166.