1. Schulze , S. Krause , M. Mayer , K. Redmer , B. Wiggenhauser , H. Grouting Defects Localized by Ultrasonic Testing Including Phase Evaluation. Proc., ASNT Topical Conference, NDE/NDT for Highways and Bridges Structural Materials Technology (SMT) Washington, DC, USA 2014 321 328
2. Spannbetonuntersuchung mit bildgebenden Ultraschallecho-Verfahren;Schulze;Beton- und Stahlbetonbau,2013
3. Ultrasonic Imaging of Concrete Elements Using Reconstruction by Synthetic Aperture Focusing Technique;Schickert;Journal of Materials in Civil Engineering (JMCE),2003
4. About dynamic flexibility of dry point contact;Lange;Defectospopiya,1971