@article{10_21136_MB_2000_125959,
     author = {Gliviak, Ferdinand},
     title = {On radially extremal graphs and digraphs, a survey},
     journal = {Mathematica Bohemica},
     pages = {215--225},
     publisher = {mathdoc},
     volume = {125},
     number = {2},
     year = {2000},
     doi = {10.21136/MB.2000.125959},
     mrnumber = {1768809},
     zbl = {0963.05072},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2000.125959/}
}