@article{2000358, title={Ultrasonic Angle-Beam Technique as a Tool for Quantitative Characterization of Small Closed Cracks}, author={S.Reaz Ahmed and Masumi Saka}, journal={JSME International Journal Series A}, volume={43}, number={4}, pages={358-366}, year={2000}, doi={10.1299/jsmea.43.358} }