@article{10_21136_CMJ_1983_101867,
     author = {Zelinka, Bohdan},
     title = {Nearly acyclic digraphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {164--165},
     year = {1983},
     volume = {33},
     number = {1},
     doi = {10.21136/CMJ.1983.101867},
     mrnumber = {687429},
     zbl = {0515.05034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1983.101867/}
}