1. Beton—art, herstellung und eigenschaft;Grübl,2001
2. Monitoring the setting and hardening of cement-based materials with ultrasound;Öztürk;Concr Sci Eng,1999
3. The coupling of ultrasound transducer arrays to concrete surfaces;Kroggel,1994
4. Mechanical properties of cement pastes and mortars at early ages;Boumiz;J Adv Cem-Based Mater,1996
5. The behaviour of ultrasonic pulses in concrete;Popovics;Cem Concr Res,1990