@article{10_21136_MB_1995_125895,
     author = {Gliviak, Ferdinand and Knor, Martin},
     title = {On radially extremal digraphs},
     journal = {Mathematica Bohemica},
     pages = {41--55},
     publisher = {mathdoc},
     volume = {120},
     number = {1},
     year = {1995},
     doi = {10.21136/MB.1995.125895},
     mrnumber = {1336945},
     zbl = {0837.05053},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1995.125895/}
}