@article{10_37236_6118,
     author = {Hiroki Koike and Daniel Pellicer and Miguel Raggi and Steve Wilson},
     title = {Flag bicolorings, pseudo-orientations, and double covers of maps},
     journal = {The electronic journal of combinatorics},
     year = {2017},
     volume = {24},
     number = {1},
     doi = {10.37236/6118},
     zbl = {1355.05112},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/6118/}
}