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@article{10_4064_cm_5_2_170_171, author = {Roman Sikorski}, title = {Some examples of {Borel} sets}, journal = {Colloquium Mathematicum}, pages = {170--171}, publisher = {mathdoc}, volume = {5}, number = {2}, year = {1957}, doi = {10.4064/cm-5-2-170-171}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-5-2-170-171/} }
Roman Sikorski. Some examples of Borel sets. Colloquium Mathematicum, Tome 5 (1957) no. 2, pp. 170-171. doi : 10.4064/cm-5-2-170-171. http://geodesic.mathdoc.fr/articles/10.4064/cm-5-2-170-171/
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