@article{greengard1997new,
  title={A new version of the fast multipole method for the Laplace equation in three dimensions},
  author={Greengard, Leslie and Rokhlin, Vladimir},
  journal={Acta numerica},
  volume={6},
  pages={229--269},
  year={1997},
  publisher={Cambridge University Press}
}

@article{greengard1998accelerating,
  title={Accelerating fast multipole methods for the Helmholtz equation at low frequencies},
  author={Greengard, Leslie and Huang, Jingfang and Rokhlin, Vladimir and Wandzura, Stephen},
  journal={IEEE Computational Science and Engineering},
  volume={5},
  number={3},
  pages={32--38},
  year={1998},
  publisher={IEEE}
}

@article{cheng1999fast,
  title={A fast adaptive multipole algorithm in three dimensions},
  author={Cheng, Hongwei and Greengard, Leslie and Rokhlin, Vladimir},
  journal={Journal of computational physics},
  volume={155},
  number={2},
  pages={468--498},
  year={1999},
  publisher={Elsevier}
}

@article{greengard2002new,
  title={A new version of the fast multipole method for screened Coulomb interactions in three dimensions},
  author={Greengard, Leslie F and Huang, Jingfang},
  journal={Journal of Computational Physics},
  volume={180},
  number={2},
  pages={642--658},
  year={2002},
  publisher={Elsevier}
}

