1. Broadband constant beamwidth transducers;Morris;J Sound Vib,1964
2. Arrays with a constant beamwidth over a wide frequency range;Tucker;Nature,1957
3. Transduction and audible displays for broadband sonar systems;Smith,1972
4. On a family of high power transducers;Hulst,1973
5. The prestressed piezo-electric sandwich transducer;Neppiras;Ultrasonics Int Conf Proc,1973