@inproceedings{ccl-fsntc-16
, author =        "Cabello, Sergio and Colin~de Verdi{\`e}re, {\'E}ric and
                   Lazarus, Francis"
, title =         "Finding shortest non-trivial cycles in directed
                   graphs on surfaces"
, journal =       "Journal of Computational Geometry"
, volume =         7
, number =         1
, pages =         "123--148"
, year =          "2016"
}