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@article{10_4064_fm_66_2_215_217, author = {J. Carruth}, title = {Lifting trees under light open maps}, journal = {Fundamenta Mathematicae}, pages = {215--217}, publisher = {mathdoc}, volume = {66}, number = {2}, year = {1970}, doi = {10.4064/fm-66-2-215-217}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-66-2-215-217/} }
J. Carruth. Lifting trees under light open maps. Fundamenta Mathematicae, Tome 66 (1970) no. 2, pp. 215-217. doi : 10.4064/fm-66-2-215-217. http://geodesic.mathdoc.fr/articles/10.4064/fm-66-2-215-217/
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