@article{Birkisson_2012,
    doi = {10.1145/2331130.2331134},
    url = {https://doi.org/10.1145%2F2331130.2331134},
    year = {2012},
    month = {aug},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {38},
    number = {4},
    pages = {1--29},
    author = {Asgeir Birkisson and Tobin A. Driscoll},
    title = {Automatic Fr{\'{e}}chet Differentiation for the Numerical Solution of Boundary-Value Problems},
    journal = {{ACM} Transactions on Mathematical Software}
}

@article{Birkisson_2012, doi = {10.1145/2331130.2331134}, url = {https://doi.org/10.1145%2F2331130.2331134}, year = {2012}, month = {aug}, publisher = {Association for Computing Machinery ({ACM})}, volume = {38}, number = {4}, pages = {1--29}, author = {Asgeir Birkisson and Tobin A. Driscoll}, title = {Automatic Fr{\'{e}}chet Differentiation for the Numerical Solution of Boundary-Value Problems}, journal = {{ACM} Transactions on Mathematical Software} }