[1]
Kolsky H. Stress Waves in Solids, published: Clarendon Press Oxford (1953).
Google Scholar
[2]
Carino N. The impact echo method: An overview, Proceedings Structures Congress & Exposition, May 21-23, 2001, Washington, D.C., American Society of Civil Engineers.
Google Scholar
[3]
Andrews David and Hughes Angela: A novel ultrasonic transducer for inspecting concrete, IEEE Proceedings Ultrasonic Symposium 1991 Vol 1 p.349 to 351.
DOI: 10.1109/ultsym.1991.234184
Google Scholar
[4]
Garnier V: Non-Destructive evaluation of concrete damage by ultrasound. Proceeding 15th World Conference on Non-destructive testing. Roma (Italy) 15th to 21st October (2000).
Google Scholar