@article{10_21136_CMJ_1993_128380,
     author = {\v{S}lapal, Josef},
     title = {Cardinal arithmetic of general relational systems},
     journal = {Czechoslovak Mathematical Journal},
     pages = {125--139},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {1993},
     doi = {10.21136/CMJ.1993.128380},
     mrnumber = {1205236},
     zbl = {0797.04001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1993.128380/}
}