On discretizations of bifurcation problems
In: Bifurcation problems and their numerical solution: Workshop on Bifurcation Problems and Their Numerical Solution Dortmund, January 15 - 17, 1980, Jg. 54, S. 46-73
Spurious solutions for discrete superlinear boundary value problems
In: Computing, Jg. 28 H. 1, S. 43-51