5[3]Richard Otto,Edward Button,Helfried Bretterebner,et al.The Application of TRT-Ture Reflection Tomography at the Unterwald Tunnel[J].Geophysics,2002,67(2):51~56.
7Otto R, Button E, Bretterebner H, et al. The application of TRT-tree reflection tomography at the unterwald tunnel [ J ]. Geophysics, 2002(2): 51 -56.