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@article{10_4064_fm_112_2_141_145, author = {Brian Fisher}, title = {Set-valued mappings on metric spaces}, journal = {Fundamenta Mathematicae}, pages = {141--145}, publisher = {mathdoc}, volume = {112}, number = {2}, year = {1981}, doi = {10.4064/fm-112-2-141-145}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-112-2-141-145/} }
Brian Fisher. Set-valued mappings on metric spaces. Fundamenta Mathematicae, Tome 112 (1981) no. 2, pp. 141-145. doi : 10.4064/fm-112-2-141-145. http://geodesic.mathdoc.fr/articles/10.4064/fm-112-2-141-145/
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