@misc{indiciaeb2d6fd70857e,
  title = {Electric Propulsion for Low Earth Orbit Constellations},
  author = {Oleson, Steven R. and Sankovic, John M.},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/19990009563},
  note = {Source identifier: 19990009563}
}