1. Sack D, Olson L. In-situ nondestructive testing of buried precast concrete pipe. Proceedings of the American Society of Civil Engineers 1994 Materials Engineering Conference, San Diego. New York: American Society of Civil Engineers, November 13–16, 1994.
2. Nondestructive testing of concrete structures using the Rayleigh wave dispersion method;Krstulovic Opara;American Concrete Institute Materials Journal,1996
3. Bungey J. Testing concrete by radar. Concrete, November/December. London: Concrete Society, 1995.
4. Control of pipeline corrosion;Peabody,1967
5. Monitoring prestressed structures;Elliott;Civil Engineering,1996