1. Draft advisory note to highways agency on NDT of masonry arch bridges;Forde,1997
2. Specifications for competitive tendering of NDT inspection of bridges;Das,2000
3. Sonic, electromagnetic and impulse radar investigation of stone masonry bridges;Colla;NDTE Int,1997
4. Forde MC. Lecture notes on radar testing of structures. MIT Summer School, July 1999.
5. Accuracy of NDE in bridge assessment;Martin;Engng Struct,1998