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Brozovsky, J., Bodnarova, L. and Brozovsky jr, J. 2019. Rebound Hammer Tests of High-Strength Concrete: Effects of Internal Stress and the Shape of the Impact Area of the Test Specimens on the Measurement Results. Periodica Polytechnica Civil Engineering. 63, 1 (2019), 215-221. DOI: https://doi.org/10.3311/PPci.11966.