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1146 Klaus Deimling: Nichtlineare Gleichungen und Abbildungsgrade. 
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4234 Klaus Deimling: Nonlinear functional analysis. Springer 1985.

23764 M. Fuchs/G. Lube: Nichtlineare Funktionalanalysis und Differentialgleichungen.
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17740 Jacobo Pejsachowicz/Robert Skiba: Fixed point theory of multivalued
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