1. R. J. Bucci, W. G. Cark, Jr., and P. C. Paris : inStress Analysis and Growth of Cracks, ASTM STP 513, 1972, p. 177.
2. R. O. Ritchie:International Metals Review, 1979, vol. 20, p. 205.
3. J. Masounave and J. P. Bailon:Scripta Met., 1976, vol. 10, p. 165.
4. J. Masounave and J. P. Bailon:Proc. 2nd Int. Conf. on Mechanical Behavior of Materials, ASM, Metals Park, OH, 1976, p. 636.
5. R. O. Ritchie:Fracture 1977, D. M. R. Taplin, ed., Waterloo, Ontario, University of Waterloo Press, 1977, vol. 2, p. 1325.