1. PN-EN12504-1: 2011 Testing concrete in structures – Part 1: Cored specimens – Taking, examining and testing in compression. European Comittee for Standarization, 2011. 10 p. (in Polish).
2. PN-EN12504-2: 2002 Testing concrete in structures – Part 2: Determination of rebound number. European Comittee for Standarization, 2002. 8 p. (in Polish).
3. PN-EN12504-4: 2005 Testing concrete in structures – Part 4: Evaluating velocity of ultrasound wave. European Comittee for Standarization, 2005. 16 p. (in Polish).
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5. Ganguli, A., Rappaport, C., M., Abramo, D., Wadia-Fascetti, S.,;1; 2012. Synthetic aperture imaging for flaw detection in a concrete medium. NDT&E Int. 45(1): 79-90.