@misc{1186551,
  author = {Judith F Gilsinn and Douglas R Shier},
  title = {Mathematical approaches to evaluating aircraft vertical separation standards:},
  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.IR.76-1067},
  language = {en},
}