Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences
@article{10_4064_aa_19_3_307_309, author = {David Lubell}, title = {On a density problem of {Erd\"os}}, journal = {Acta Arithmetica}, pages = {307--309}, publisher = {mathdoc}, volume = {19}, number = {3}, year = {1971}, doi = {10.4064/aa-19-3-307-309}, language = {de}, url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-19-3-307-309/} }
David Lubell. On a density problem of Erdös. Acta Arithmetica, Tome 19 (1971) no. 3, pp. 307-309. doi : 10.4064/aa-19-3-307-309. http://geodesic.mathdoc.fr/articles/10.4064/aa-19-3-307-309/
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