@article{Feder_2002,
    doi = {10.1002/jgt.10073},
    url = {https://doi.org/10.1002%2Fjgt.10073},
    year = {2002},
    month = {nov},
    publisher = {Wiley},
    volume = {42},
    number = {1},
    pages = {61--80},
    author = {Tomas Feder and Pavol Hell and Jing Huang},
    title = {Bi-arc graphs and the complexity of list homomorphisms},
    journal = {Journal of Graph Theory}
}

@article{Feder_2002, doi = {10.1002/jgt.10073}, url = {https://doi.org/10.1002%2Fjgt.10073}, year = {2002}, month = {nov}, publisher = {Wiley}, volume = {42}, number = {1}, pages = {61--80}, author = {Tomas Feder and Pavol Hell and Jing Huang}, title = {Bi-arc graphs and the complexity of list homomorphisms}, journal = {Journal of Graph Theory} }