@article{Gajentaan_2012,
    doi = {10.1016/j.comgeo.2011.11.006},
    url = {https://doi.org/10.1016%2Fj.comgeo.2011.11.006},
    year = {2012},
    month = {may},
    publisher = {Elsevier {BV}},
    volume = {45},
    number = {4},
    pages = {140--152},
    author = {Anka Gajentaan and Mark H. Overmars},
    title = {On a class of {$O(n^2)$} problems in computational geometry},
    journal = {Computational Geometry}
}

@article{Gajentaan_2012, doi = {10.1016/j.comgeo.2011.11.006}, url = {https://doi.org/10.1016%2Fj.comgeo.2011.11.006}, year = {2012}, month = {may}, publisher = {Elsevier {BV}}, volume = {45}, number = {4}, pages = {140--152}, author = {Anka Gajentaan and Mark H. Overmars}, title = {On a class of {$O(n^2)$} problems in computational geometry}, journal = {Computational Geometry} }