1. Ultrasonic inspection of structural factors in pearlite steel;Kopec,1979
2. Attenuation of ultrasound as a phenomenon depending on fatigue limit in the structure of railway axles;Kopec,1981
3. Revised grain-scattering formulae and tables;Papadakis;J Acoust Soc Am,1965
4. Vorauss etz ungen, mölichkeiten und grenezen der korngrössenermittlung duch ultraschallschwächungsmessungen;Aurich;Arch Eisenhüttenwes,1980
5. Ultrasonic inspection of grain size in the materials for railway wheel set;Kopec;Ultrasonics,1975