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@article{10_4064_cm_42_1_119_120, author = {Paul Erd\"os}, title = {Some remarks on subgroups of real numbers}, journal = {Colloquium Mathematicum}, pages = {119--120}, publisher = {mathdoc}, volume = {42}, number = {1}, year = {1979}, doi = {10.4064/cm-42-1-119-120}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-42-1-119-120/} }
Paul Erdös. Some remarks on subgroups of real numbers. Colloquium Mathematicum, Tome 42 (1979) no. 1, pp. 119-120. doi : 10.4064/cm-42-1-119-120. http://geodesic.mathdoc.fr/articles/10.4064/cm-42-1-119-120/
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