1. NDE applications of air-coupled ultrasonic transducers;Grandia;Proc IEEE Ultrason Symp,1995
2. Air coupled NDE. Constrains and solutions for industrial implementation;Hayward;Proc IEEE Ultrason Symp,1997
3. Bridging the gap of impedance mismatch between air and solid materials;Gomez;Proc IEEE Ultrason Symp,2000
4. High sensitive piezoelectric transducers for NDE air borne applications;Montero de Espinosa;Proc IEEE Ultrason Symp,2000
5. Surface micromachined capacitive ultrasonic transducers;Ladabaum;IEEE Trans Ultrason, Ferrroelect, Freq Control,1998