@article{CTT100819604,
  author = {Jason Maximino C. Ongpeng and Andres Winston C. Oreta and SOHICHI HIROSE},
  title = {Contact and Noncontact Ultrasonic Nondestructive Test in Reinforced Concrete Beam},
  journal = {Advances in Civil Engineering},
  year = 2018,
}

@article{CTT100819605,
  author = {Jason Maximino C. Ongpeng and Andres Winston C. Oreta and SOHICHI HIROSE},
  title = {Characterization of damage using ultrasonic test on different types of concrete},
  journal = {Materials Evaluation},
  year = 2018,
}