9FAIRHURST C. Stress estimation in rock: a brief history and review[J]. International Journal of Rock Mechanics and Mining Sciences, 2003, 40(7/8): 957 - 973.
10ZOBACK M D, TSUKAHARA H, HICKMAN S. Stress measure- ments at depth in the vicinity of the San Andreas Fault--implications for the magnitude of shear stress at depth[J]. Journal of Geophysical Research, 1980, 85(B11):6 157-6 173.