1. On the flexural rigidity of a beam weakened by transverse saw cuts;Koiter;Proc K Ned Akad Wet,1956
2. Stress distribution in a notched plate;Wigglesworth;Mathematika,1957
3. Irwin GR. The crack-extension-force for a crack at a free boundary. NRL Rept 5120; 1958.
4. Bueckner HF. Some stress singularities and their computation by means of singular integral equations. Boundary problems in differential equations. Madison: Univ Wisconsin Press; 1960. p. 215–30.
5. Depth and spacing of tension cracks;Lachenbruch;J Geophys Res,1961