@article{10_21136_CMJ_1985_102012,
     author = {Schwarz, \v{S}tefan},
     title = {Common consequents in directed graphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {212--247},
     publisher = {mathdoc},
     volume = {35},
     number = {2},
     year = {1985},
     doi = {10.21136/CMJ.1985.102012},
     mrnumber = {787126},
     zbl = {0575.05041},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1985.102012/}
}