1. T. Skåre, Dynamiskt belastade tribologiska system under plastisk formning, del II—analyserade med akustisk emission, CODEN: LUTMDN/(TMMV-1037)/1-333/(2001), Doctorat thesis (in Swedish), Department of Production and Materials Engineering, Lund Institute of Technology, Lund University, 2001.
2. F. Krantz, Tool wear of stamping dies, Volvo Cars Body Components, Report No. 34423-02-0026, Olofström, 2002.
3. Monitoring of friction processes by the means of acoustic emission measurements—deep drawing of sheet metal;Skåre;J. Mater. Process. Technol.,1998
4. P. McIntire, K.R. Miller, Nondestructive Testing Handbook, second ed., vol. 5. Acoustic Emission Testing, American Society for Nondestructive Testing, 1987, ISBN 0-931403-02-2.