@article{10_21136_CMJ_1982_101843,
     author = {Mikola, Milan},
     title = {Coelevation of a graph},
     journal = {Czechoslovak Mathematical Journal},
     pages = {648--654},
     year = {1982},
     volume = {32},
     number = {4},
     doi = {10.21136/CMJ.1982.101843},
     mrnumber = {682141},
     zbl = {0514.05057},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101843/}
}