@article{Norine_2006,
    doi = {10.1016/j.jctb.2006.01.006},
    url = {https://doi.org/10.1016%2Fj.jctb.2006.01.006},
    year = {2006},
    month = {sep},
    publisher = {Elsevier {BV}},
    volume = {96},
    number = {5},
    pages = {754--757},
    author = {Serguei Norine and Paul Seymour and Robin Thomas and Paul Wollan},
    title = {Proper minor-closed families are small},
    journal = {Journal of Combinatorial Theory, Series B}
}

@article{Norine_2006, doi = {10.1016/j.jctb.2006.01.006}, url = {https://doi.org/10.1016%2Fj.jctb.2006.01.006}, year = {2006}, month = {sep}, publisher = {Elsevier {BV}}, volume = {96}, number = {5}, pages = {754--757}, author = {Serguei Norine and Paul Seymour and Robin Thomas and Paul Wollan}, title = {Proper minor-closed families are small}, journal = {Journal of Combinatorial Theory, Series B} }