1. PHMSA. Pipeline Incident 20 Year Trend. (US DOT Pipeline and Hazardous Materials Safety Administration). at
2. Practical long range guided wave inspection-applications to pipes and rail;Cawley,2003
3. Rapid, long range inspection of chemical plant pipework using guided waves;Alleyne,2001
4. The use of ultrasonic guided waves and wavelets analysis in pipe inspection
5. Investigation on interaction of Lamb waves and circumferential notch in pipe by means of wavelet transform;Sun,2000