Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MOMA_1984__98_178208, author = {Richard Warlimont}, title = {Covering {Sets} by {Subsets.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {323--330}, publisher = {mathdoc}, volume = {98}, year = {1984}, zbl = {0545.05006}, url = {http://geodesic.mathdoc.fr/item/MOMA_1984__98_178208/} }
Richard Warlimont. Covering Sets by Subsets.. Monatshefte für Mathematik, Tome 98 (1984), pp. 323-330. http://geodesic.mathdoc.fr/item/MOMA_1984__98_178208/