On Some Non-Linear Problems

A Fixed Point Theorem for Mappings which do not Increase Distances

1965 • 996 citations

NONEXPANSIVE NONLINEAR OPERATORS IN A BANACH SPACE

1965 • 895 citations

TOPOLOGICAL METHODS IN THE THEORY OF NON-LINEAR INTEGRAL EQUATIONS

1966 • 619 citations

On non-expansive mappings of Banach spaces

1964 • 91 citations

Weak Compactness and Separation

1964 • 4 citations