@article{6860,
  author = {M. Bradley and J. Porto and S. Rainville and James Thompson and D. Pritchard},
  title = {Penning Trap Measurements of the Masses of C133s, R87,85b, and N23a with Uncertainties <=0.2 ppb},
  year = {1999},
  journal = {Physical Review Letters},
  volume = {83},
  pages = {4510-4513},
  month = {1999-11},
  issn = {0031-9007},
  url = {http://link.aps.org/doi/10.1103/PhysRevLett.83.4510},
  doi = {10.1103/PhysRevLett.83.4510},
}