1. Anderson, O. L. & Grew, P. C. Rev. Geophys. Space Phys. 15, 77–104 (1977).
2. McKinnis, C. L. in Fracture Mechanics of Ceramics (eds Bradt, R. C., Hasselman, D. P. H. & Lange, F. F.) 581–596 (Plenum, New York, 1978).
3. Michalske, T. A., Varner, J. R. & Frechette, V. D. in Fracture Mechanics of Ceramics (eds Bradt, R. C., Hasselman, D. P. H. & Lange, F. F.) 639–650 (Plenum, New York, 1978).
4. Yahalom, J. Stress Corrosion Cracking (Trans Technical Publications, Rockport, 1979).
5. Martin, R. L. J. geophys. Res. 77, 1406–1419 (1972).