1. Long range propagation of Lamb waves in chemical plant pipework;Alleyne;Mater. Eval.,1997
2. Three-dimensional investigation of the propagation of waves in hollow circular cylinder;Gazis;J. Acoust. Soc. Am.,1959
3. Their submitted papers could be cited in http://www.ic.ac.uk/research/ndt/public/publication.
4. Ultrasonic Waves in Solid Media;Rose,1999
5. Mode conversion of longitudinal and torsional guided modes due to pipe bends;Demma;Rev. Prog. QNDE,2001