1. Abraham, D.M., Iseley, T., Prasanth, R.K. and Wirahadikusumah, R., Integrating sensing technologies for underground utility assessment, ASCE Conf. on Infrastruct. Condition Assessment: Art, Sci., Pract., ASCE, Reston, Va., pp. 316–325, 1997.
2. Armstrong, K. and Barrett, R., Care and Repair of Advanced Composites (SAE—1998, ISBN: 0768000475), 1998.
3. Campbell, R., Rogers, K. and Gibert, J., PIRAT—A system for quantitative sewer assessment, Int. No-Dig. 95 Conf., Hamburg-Messe & Congress GmbH (HMC), Dresden, Germany, pp. 455–462, 1995.