@article{10_4064_cm_13_2_223_233,
     author = {J. Anusiak},
     title = {On set-theoretically independent collections of balls},
     journal = {Colloquium Mathematicum},
     pages = {223--233},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1964},
     doi = {10.4064/cm-13-2-223-233},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-13-2-223-233/}
}