Theory of nonlinear operators : proceedings of a summer school held in september 1971 at Babylon; Czechoslovakia - Academia, Publishing House of the Czechoslovak Academy of Sciencies (Prague : Academia, Publishing House of the Czechoslovak Academy of Sciencies, 1973)
On the inversion of some differentiable mappings with singularities between banach spaces
On nonlinear spectral theory
Folgen und iterationsverfahren bei folgen nichtlinearer variationsungleichungen
Remarks on nonlinear eigenvalve problems
Keywords: Teoría de Operadores no Lineales