@article{bwmeta1.element.bwnjournal-article-fmv102i1p6bwm, author = {R. Gardner}, title = {On concentrated sets}, journal = {Fundamenta Mathematicae}, volume = {103}, year = {1979}, pages = {45-53}, zbl = {0415.54022}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv102i1p6bwm} }
Gardner, R. On concentrated sets. Fundamenta Mathematicae, Tome 103 (1979) pp. 45-53. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv102i1p6bwm/