@article{10_21136_CMJ_1970_100992,
     author = {Schwarz, \v{S}tefan},
     title = {On a sharp estimation in the theory of binary relations on a finite set},
     journal = {Czechoslovak Mathematical Journal},
     pages = {703--714},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1970},
     doi = {10.21136/CMJ.1970.100992},
     mrnumber = {0282862},
     zbl = {0226.20061},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1970.100992/}
}