6H.-J.Salzburger,G.Dobmann,H.Mohrbacher.Quality control oflaser welds of tailored blanks using guided waves and EMATs[J].IEE Proc.Sci.Meas.Technol,2001,148(4):143-148.
7Hirotsugu Ogi,Masahiko Hirao,and Toshihiro Ohtani.Line focusingelectromagnetic acoustic transducers for the detection of slit defects[J].IEEE Trans.on Ultrasonics,Ferroelectrics,and FrequencyControl,1999,46(2):341-346.