@article{Beeson_2005,
    doi = {10.1016/j.jsc.2004.12.002},
    url = {https://doi.org/10.1016%2Fj.jsc.2004.12.002},
    year = {2005},
    month = {may},
    publisher = {Elsevier {BV}},
    volume = {39},
    number = {5},
    pages = {523--538},
    author = {Michael Beeson and Freek Wiedijk},
    title = {The meaning of infinity in calculus and computer algebra systems},
    journal = {Journal of Symbolic Computation}
}

@article{Beeson_2005, doi = {10.1016/j.jsc.2004.12.002}, url = {https://doi.org/10.1016%2Fj.jsc.2004.12.002}, year = {2005}, month = {may}, publisher = {Elsevier {BV}}, volume = {39}, number = {5}, pages = {523--538}, author = {Michael Beeson and Freek Wiedijk}, title = {The meaning of infinity in calculus and computer algebra systems}, journal = {Journal of Symbolic Computation} }