Meronk, Błażej, and Krzysztof Wilde. “Diagnostics of Concrete Plate in Bending With Ultrasonic Waves Modulated by Low Frequency Oscillations”. Budownictwo I Architektura, vol. 12, no. 1, Mar. 2013, pp. 243-50, doi:10.35784/bud-arch.2205.