@article{10_4064_cm_11_1_81_84,
     author = {S. Zn\'am},
     title = {On a combinatorical problem of {K.} {Zarankiewicz}},
     journal = {Colloquium Mathematicum},
     pages = {81--84},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1963},
     doi = {10.4064/cm-11-1-81-84},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-11-1-81-84/}
}