@misc{1153956,
  author = {James E Gray},
  title = {Clock synchronization and comparison::problem, techniques and hardware},
  year = {1976},
  month = {1976-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.TN.691},
  language = {en},
}