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
On the numerical approximation of phase portraits near stationary points
In: SIAM journal on numerical analysis, Jg. 24 H. 5, S. 1095-1113