@article{PRL104,
  title = {Why are Nonlinear Fits to Data so Challenging?},
  author = {Transtrum, Mark K. and Machta, Benjamin B. and Sethna, James P.},
  journal = {Phys. Rev. Lett.},
  volume = {104},
  issue = {6},
  pages = {060201},
  numpages = {4},
  year = {2010},
  month = {Feb},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevLett.104.060201},
  url = {http://link.aps.org/doi/10.1103/PhysRevLett.104.060201}
}

@article{PRE83,
  title = {Geometry of nonlinear least squares with applications to sloppy models and optimization},
  author = {Transtrum, Mark K. and Machta, Benjamin B. and Sethna, James P.},
  journal = {Phys. Rev. E},
  volume = {83},
  issue = {3},
  pages = {036701},
  numpages = {35},
  year = {2011},
  month = {Mar},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevE.83.036701},
  url = {http://link.aps.org/doi/10.1103/PhysRevE.83.036701}
}

@article{transtrum2012improvements,
  title={Improvements to the Levenberg-Marquardt algorithm for nonlinear least-squares minimization},
  author={Transtrum, Mark K and Sethna, James P},
  journal={arXiv preprint arXiv:1201.5885},
  year={2012}
}