1. Cheng JL, Yu SJ, Wang WM. The rocks test and detection. Beijing: Seismic Press, 2000. p. 91–106 (in Chinese).
2. Yang WC, Li YM. Applied seismic tomography. Beijing: Geology Press, 1993. p. 5–45 (in Chinese).
3. Nolet G. Seismic tomography. Reidel Company Press. 1990. p. 69–75.
4. Yang WC. Theory, methods of geophysical inversion. Beijing: Geological Publishing Press, 1997. p. 134–6.
5. Detection of the failure depth of coal seam floor by acoustic wave computer tomography;Cheng;J China Coal Soc,1999