@article{aoki_hirai_nishimura_hiroi_koshimizu_nagasawa_2009, 
  title={20617 Reduction of Residual Stress of Welding Joint on Block Using Ultrasonic Vibration}, 
  volume={2009.15}, 
  DOI={10.1299/jsmekanto.2009.15.315}, 
  publisher={Japan Society of Mechanical Engineers}, 
  author={Aoki and Hirai and Nishimura and Hiroi and Koshimizu and Nagasawa}, 
  year={2009}
  }