1. Biomedical ultrasonics;Wells,1977
2. 1993 Acoustical data for diagnostic ultrasound equipment,1993
3. Output data from European studies;Duck;Ultrasound Med Biol,1989
4. Standard for real-time display of thermal and mechanical acoustic output indices on diagnostic ultrasound equipment,1991
5. Essentials of ultrasound physics;Zagzebski,1996