1. Allgower,E.,K.Böhmer, S.Mc Cormick: Discrete correction methods for operator equations, in "Numerical solution of nonlinear equations",Eds.:E.Allgower, K.Glashoff, H.-O.Peitgen, 30–97 (1981).
2. Ames, W.F.: Nonlinear partial differential equations in engineering, Academic Press, New York-London (1965).
3. Böhmer, K.: Discrete Newton methods and iterated defect corrections, Numer.Math.37, 167–192(1981).
4. Böhmer, K.: Asymptotic expansions for the discretization error in Poisson's equation on general domains, in "Multivariate Approximation Theory",Eds.W.Schempp, K.Zeller, ISNM 51,30–45 (1979).
5. Böhmer,K.: High order difference methods for quasilinear elliptic boundary value problems on general regions, Math.Research Center, University of Wisconsin-Madison, Technical Summary Report Nr. 2042, 1980.