@article{Trummer_2000,
    doi = {10.1016/s0168-9274(99)00133-6},
    url = {https://doi.org/10.1016%2Fs0168-9274%2899%2900133-6},
    year = {2000},
    month = {jul},
    publisher = {Elsevier {BV}},
    volume = {34},
    number = {2-3},
    pages = {275--292},
    author = {Manfred R. Trummer},
    title = {Spectral methods in computing invariant tori},
    journal = {Applied Numerical Mathematics}
}

@article{Trummer_2000, doi = {10.1016/s0168-9274(99)00133-6}, url = {https://doi.org/10.1016%2Fs0168-9274%2899%2900133-6}, year = {2000}, month = {jul}, publisher = {Elsevier {BV}}, volume = {34}, number = {2-3}, pages = {275--292}, author = {Manfred R. Trummer}, title = {Spectral methods in computing invariant tori}, journal = {Applied Numerical Mathematics} }