1. Setting time and strength of concrete using the impact-echo method;Pessiki;ACI Materials Journal,1998
2. Monitoring the setting and hardening of cement-based materials with ultrasound;Öztürk;Concrete Science and Engineering,1999
3. Using ultrasound to monitor stiffening process of concrete with admixtures;Rapoport;ACI Materials Journal,2000
4. Nondestructive measurement of concrete strength gain by an ultrasonic wave reflection method;Akkaya;Materials and Structures,2003