@misc{indiciae87a71762bbb8,
  title = {Round-Trip Solar Electric Propulsion Missions for Mars Sample Return},
  author = {Bailey, Zachary J. and Sturm, Erick J. and Kowalkowski, Theresa D. and Lock, Robert E. and Woolley, Ryan C. and Nicholas, Austin K.},
  year = {2014},
  url = {https://ntrs.nasa.gov/citations/20160008159},
  note = {Source identifier: 20160008159}
}