1. E. Sternberg, Three-Dimensional Stress Concentrations in the Theory of Elasticity, Applied Mechanics Reviews 11, 1, (1968).
2. J. B. Alblas, Theory of the Three-Dimensional State of Stress in a Plate with a Hole, H. J. Paris (Amsterdam) (1957).
3. R. J. Hartranft and G. C. Sih, The Use of Eigenfunction Expansions in the General Solution of Three-Dimensional Crack Problems, J. Math. Mech., 19 (1969) 123.
4. R. J. Hartranft and G. C. Sih, An Approximate Three-Dimensional Theory of Plates with Application to Crack Problems, Technical Report No. 7, Lehigh University Institute of Research, (May 1968).
5. J. H. Argyris, Matrix Analysis of Three-Dimensional Elastic Media, Small and Large Displacements, AIAA Jnl.
3 (1965) 45.