Finite Dimensional Approximation of Nonlinear Problems. Part I. Branches of Nonsingular Solutions. F. Brezzi, J. Rappaz, P.A. Raviart (1980/1981) Numerische Mathematik
Finite Dimensional Approximation of Nonlinear Problems. Part II : Limit Points. F. Brezzi, J. Rappaz, P.A. Raviart (1981) Numerische Mathematik
Finite Dimensional Approximation of Nonlinear Problems. Part III : Simple Bifurcation Points. F. Brezzi, J. Rappaz, P.A. Raviart (1982) Numerische Mathematik