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@article{10_4064_fm_48_1_1_14, author = {J. Nagata}, title = {On the countable sum of zero-dimensional metric spaces}, journal = {Fundamenta Mathematicae}, pages = {1--14}, publisher = {mathdoc}, volume = {48}, number = {1}, year = {1959}, doi = {10.4064/fm-48-1-1-14}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-48-1-1-14/} }
J. Nagata. On the countable sum of zero-dimensional metric spaces. Fundamenta Mathematicae, Tome 48 (1959) no. 1, pp. 1-14. doi : 10.4064/fm-48-1-1-14. http://geodesic.mathdoc.fr/articles/10.4064/fm-48-1-1-14/
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