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@article{10_4064_fm_72_3_203_221, author = {Benjamin Halpern}, title = {Invariant metric properties of maps}, journal = {Fundamenta Mathematicae}, pages = {203--221}, publisher = {mathdoc}, volume = {72}, number = {3}, year = {1971}, doi = {10.4064/fm-72-3-203-221}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-72-3-203-221/} }
Benjamin Halpern. Invariant metric properties of maps. Fundamenta Mathematicae, Tome 72 (1971) no. 3, pp. 203-221. doi : 10.4064/fm-72-3-203-221. http://geodesic.mathdoc.fr/articles/10.4064/fm-72-3-203-221/
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