1. Federal railroad administration. Safety statistics data: 1992–2002. U.S. Department of Transportation. 2002
2. Grisso BL, Martin LA, Inman DJ. A wireless active sensing system for impedance-based structural health monitoring. In: Proceedings of IMAC XXIII. 2005
3. Giurgiutiu V, Rogers CA. Electro-mechanical (E/M) impedance method for structural health monitoring and nondestructive evaluation. In: International workshop on structural health monitoring. Stanford University. 1997. p. 433–4
4. Tseng K.K., Soh C.K., Gupta A., Bhalla S.. Health monitoring of civil infrastructures using smart piezoceramic transducers. In: 2nd Int. conf. on comp. meth. for smart str. and mat. 2000. pp. 153–62
5. Overview of piezoelectric impedance-based health monitoring and path forward;Park;The Shock and Vibration Digest,2003