1. Ultrasonic inspection of structural factors in pearlite steel;Kopec,1979
2. Effect of interlamellar spacing of pearlite on the attenuation of ultrasound;Kopec;NDT International,1979
3. Revised grain-scattering formulae and tables;Papadakis;J Acoust Soc Am,1965
4. Ultrasound in measure technique;Obraz,1984