1. Sound field characteristics of extremely short ultrasonic pulse radiated by a concave transducer;Kikuchi;19th conf Jap Soc Ultras Med No 19–31,1971
2. Signal processing techniques in ultrasonic diagnosis;Okujima;20th conf Jap Soc Ultras Med No P-14,1972
3. Matching layers for electroacoustic receiving transducer;Pirgov;Akust Zh,1973
4. Ultrasonic Doppler probes — cardiovascular applications of ultrasound;Wells,1974