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Jaworowski, J.W. (1970). Set-valued fixed points theorems for approximative retracts. In: Fleischman, W.M. (eds) Set-Valued Mappings, Selections and Topological Properties of 2x . Lecture Notes in Mathematics, vol 171. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0069717
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DOI: https://doi.org/10.1007/BFb0069717
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