1. Washizu, K.: Variational methods in elasticity and plasticity, 2nd Edition. Pergamon Press, 1975.
2. Wood, R.D., u.O.C. Zienkiewicz: Geometrically nonlinear finite element analysis of beams, frames, arches and axissymmetric shells. Comp. & Struct. Bd. 7 (1977) S. 725/35.
3. Bergan, P.G., G. Horrigmoe, B. Krakeland u.T. Söreide: Solution techniques for nonlinear finite element problems. Int. J. num. Meth. Engng. Bd. 12 (1978) S. 1677/96.
4. Argyris, J.H., u.P.C. Dunne: On the application of the natural mode technique to small strain large displacement problems. Proc. World Congress on Finite Element Methods in Structural Mechanics, Bournemouth/England, 1975.
5. Honecker, A.: Entwicklung, Implementierung und Austestung von Lösungsalgorithmen für Gleichungssysteme mit singulär werdender Funktionalmatrix. Diplomarbeit TU Berlin, 1980.