@article{CTT100657969,
  author = {YOSHIO TOMITA and Mitsuyasu Iwanami and NOBUAKI OTSUKI},
  title = {Nondestructive Evaluation of Fresh Grouting Performance in Prestressed Concrete Members by Impact Echo},
  journal = {Proceedings of JSCE (Japan Society of Civil Engineers)},
  year = 2000,
}

@article{CTT100658035,
  author = {YOSHIO TOMITA and Mitsuyasu Iwanami and NOBUAKI OTSUKI},
  title = {A Fundamental Study on Evaluation of Grouting Condition in Prestressed Concrete by Impact-echo Method},
  journal = {Proceedings of the Japan Concrete Institute},
  year = 1999,
}

@article{CTT100658554,
  author = {YOSHIO TOMITA and NOBUAKI OTSUKI and KAORI MATSUMOTO},
  title = {Evaluation of Grouting Condition in Prestressed Concrete by Impact Echo Method},
  journal = {},
  year = 1999,
}