1. A.G. Davis, The Non-Destructive Impulse Response test in North America – 1985-2001, NDT& International, 36 (2003), Elsevier Science Ltd., pp. 185-193.
2. Theoretical Interpretation of Impulse Response Test of Embedded Concrete Structures;Ottosen;ASCE Journal of Engineering Mechanics,2004
3. Void detection in grouted ducts using the Impact-Echo method;Carino;ACI Materials Journal,1992
4. Impact-Echo – Nondestructive Evaluation of Concrete and Masonry;Sansalone,1997
5. Impact-Echo: The complete story;Sansalone;ACI Structural Journal,1997