(1979). Functional differential equations and approximation of fixed points. Springer-Verlag.
Čikaški stil citiranja (17. izdanje)Functional Differential Equations and Approximation of Fixed Points. Berlin: Springer-Verlag, 1979.
MLA način citiranja (9. izdanje)Functional Differential Equations and Approximation of Fixed Points. Springer-Verlag, 1979.
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