1. Quantitative nondestructive evaluation of defects in concrete surface layer by impact acoustics methods;Kamata T;J JSCE V,2002
2. Study on detail inspection of internal defect in concrete structures using ultrasonic pulse;Murase Y;Monthly J Inst Industr Sci,2004
3. Non-Destructive Inspection of Reinforced Concrete by Electromagnetic Wave (Radar) Based on a Peak Pattern Recognition of Received Signals
4. Nikkan Kogyo Shimbun Web Edition: Nov. 27 2015(in Japanese).
5. Fundamental studies on the use of heat‐infrared ray technique to determine the condition of voids and reinforcement in concrete structures;Yanai M;J JSCE,1992