1. K. Aki and P. G. Richards,Quantitative Seismology, Chaps. 2?4 (W.H. Freeman and Company, New York, 1980).
2. ASTM E1106-86, Standard Method for Primary Calibration of Acoustic Emission Sensors, Annual Book of ASTM Standards, Vol. 03.03, ASTM, Philadelphia, 1986, pp. 949?969.
3. M. Enoki and T. Kishi, Theory and analysis of deformation moment tensor due to microcracking,Int. J. Frac.,38:295?310 (1988).
4. N. N. Hsu, J. A. Simmons and S. C. Hardy, An approach to acoustic emission signal analysis,Mater. Eval.,35:100?106 (1977).
5. N. N. Hsu and F. R. Breckenridge, Characterization and calibration of acoustic emission transducers,Mater. Eval.,39:60?68 (1981).