1. Ultrasonics: Methods and Applications;Blitz,1971
2. Methods of measuring the performance of ultrasonic pulse-echo diagnostic equipment;Brendel;Ultrasound Med. Biol.,1976
3. Probleme and Fortschritte der Ultraschall diagnostik am Auge;Buschmann;Klin. Mbl. Augenheilk.,1975
4. Measurement of equipment sensitivity in diagnostic ultrasonography;Buschmann,1977
5. Sicherung gleichbleibender echographischer Untersuchungsbedingungen über längere Zeiträume;Haigis,1979