@article{10_21136_CMJ_1963_100592,
     author = {\'Ad\'am, Andr\'as and \v{C}ul{\'\i}k, Karel and Poll\'ak, Gy\"orgy},
     title = {Ein {Satz} \"uber teilweise gerichtete {Graphen}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {619--621},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1963},
     doi = {10.21136/CMJ.1963.100592},
     mrnumber = {0165510},
     zbl = {0117.17401},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1963.100592/}
}