@article{10_4064_fm_102_1_45_53,
     author = {R. Gardner},
     title = {On concentrated sets},
     journal = {Fundamenta Mathematicae},
     pages = {45--53},
     publisher = {mathdoc},
     volume = {102},
     number = {1},
     year = {1979},
     doi = {10.4064/fm-102-1-45-53},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-102-1-45-53/}
}