@article{2122,
  author = {Judah Levine},
  title = {Improvements to the NIST network time protocol servers},
  year = {2008},
  journal = {Metrologia},
  volume = {45},
  pages = {S12 - S22},
  month = {Jan-12-2008},
  issn = {0026-1394},
  doi = {10.1088/0026-1394/45/6/S03},
}