@article{Alon_1992,
    doi = {10.1007/bf01204715},
    url = {https://doi.org/10.1007%2Fbf01204715},
    year = {1992},
    month = {jun},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {12},
    number = {2},
    pages = {125--134},
    author = {N. Alon and M. Tarsi},
    title = {Colorings and orientations of graphs},
    journal = {Combinatorica}
}

@article{Alon_1992, doi = {10.1007/bf01204715}, url = {https://doi.org/10.1007%2Fbf01204715}, year = {1992}, month = {jun}, publisher = {Springer Science and Business Media {LLC}}, volume = {12}, number = {2}, pages = {125--134}, author = {N. Alon and M. Tarsi}, title = {Colorings and orientations of graphs}, journal = {Combinatorica} }