1. M. Kuna, L. Wiltinger, and J. Altenbach, Maschinenbautechnik 30 (1981) 4?8 and 75?78.
2. T.H.H. Pian and K. Moriya, in Numerical Methods in Fracture Mechanics, Swansea University Press, Swansea (1978) 363?373.
3. H. Tada, P. C. Paris, and G. R. Irwin, The Stress Analysis of Cracks, Hellertown (1973).
4. M. Kuna, Proceedings of the IX International Congress on Application of Mathematics in Engineering, Weimar (1981).
5. L. Wiltinger, zur Arwendung der Methode der finiten Elemente auf die Behandlung räumlicher statischer Rissprobleme, Thesis, Technical Highschool, Magdeburg (1980).