5Klaus Siegert, Jochen Ulmer. Superimposing ultrasonic waves on the dies in tube and wire drawing. Journal of Engineering Materials and Technology, 2001, 123(4) : 517 - 523
6Nishant Unnikrishnan, Probir Kumar Ray, Ajay Mahajan, et al.Accuracy considerations in a 3-D ultrasonic positioning system based on the difference in time of flights. Journal of Dynamic Systems, Measurement, and Control, 2002, 124(4): 688 - 693
7M G Lozev, R L Spencer, D Hodgkinson. Optimized inspection of thin-walled pipe welds using advanced ultrasonic techniques. Journal of Pressure Vessel Technology, 2005, 127(3): 237-243
8Sayed A Nassar, Aditya B Veeram. Ultrasonic control of fastener tightening using varying wave speed. Journal of Pressure Vessel Technology, 2006, 128(3) : 427-432