@article{10_37236_4938,
     author = {Edita M\'a\v{c}ajov\'a and Andr\'e Raspaud and Martin \v{S}koviera},
     title = {The chromatic number of a signed graph},
     journal = {The electronic journal of combinatorics},
     year = {2016},
     volume = {23},
     number = {1},
     doi = {10.37236/4938},
     zbl = {1329.05116},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4938/}
}