@article{10_21136_MB_1997_125917,
     author = {Zelinka, Bohdan},
     title = {Circular distance in directed graphs},
     journal = {Mathematica Bohemica},
     pages = {113--119},
     year = {1997},
     volume = {122},
     number = {2},
     doi = {10.21136/MB.1997.125917},
     mrnumber = {1460940},
     zbl = {0889.05045},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1997.125917/}
}