@article{1969,
  doi = {10.1056/nejm196909182811208},
  url = {http://dx.doi.org/10.1056/NEJM196909182811208},
  year = {1969},
  month = {sep},
  publisher = {New England Journal of Medicine ({NEJM}/{MMS})},
  volume = {281},
  number = {12},
  pages = {676--677},
  title = {{Definition of Sole Contribution}},
  journal = {New England Journal of Medicine},
}


@article{Angell_1991,
  doi = {10.1056/nejm199111073251910},
  url = {http://dx.doi.org/10.1056/NEJM199111073251910},
  year = {1991},
  month = {nov},
  publisher = {New England Journal of Medicine ({NEJM}/{MMS})},
  volume = {325},
  number = {19},
  pages = {1371--1373},
  author = {Marcia Angell and Jerome P. Kassirer},
  title = {{The Ingelfinger Rule Revisited}},
  journal = {New England Journal of Medicine},
}
