@article{10_21136_CMJ_1974_101236,
     author = {Schwarz, \v{S}tefan},
     title = {Circulant {Boolean} relation matrices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {252--253},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1974},
     doi = {10.21136/CMJ.1974.101236},
     mrnumber = {0348018},
     zbl = {0315.15011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1974.101236/}
}