1. Supersonic reflectoscope, an instrument for inspecting the interior of solid parts by means of sound waves;Firestone;J. Acoust. Soc. Am.,1945
2. The use of the ultrasonic reflectoscope for the continuous recording of movements of heart walls;Edler;Kungl. Fysiogr. Sällsk. Lund Förhandl.,1954
3. Der Ultraschall;Bergmann,1954
4. Fundamentals of Ultrasonics;Blitz,1963
5. Fundamentals of Ultrasonics;Blitz,1963