@misc{indiciae5825b8755517,
  title = {Research in Modeling and Simulation for Airspace Systems Innovation},
  author = {Ballin, Mark G. and Kimmel, William M. and Welch, Sharon S.},
  year = {2007},
  url = {https://ntrs.nasa.gov/citations/20080002267},
  note = {Source identifier: 20080002267}
}