@article{10_21136_CMJ_1954_100122,
     author = {Fabian, V\'aclav},
     title = {Structural relation},
     journal = {Czechoslovak Mathematical Journal},
     pages = {354--363},
     publisher = {mathdoc},
     volume = {04},
     number = {4},
     year = {1954},
     doi = {10.21136/CMJ.1954.100122},
     mrnumber = {0068190},
     zbl = {0059.13402},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1954.100122/}
}