@article{10_4064_cm_7_2_167_170,
     author = {P. Erd\"os},
     title = {About an estimation problem of {Zahorski}},
     journal = {Colloquium Mathematicum},
     pages = {167--170},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1959},
     doi = {10.4064/cm-7-2-167-170},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-7-2-167-170/}
}