@misc{indiciae1f5ac965579a,
  title = {Preliminary Design of Low-Thrust Interplanetary Missions},
  author = {Sims, Jon A. and Flanagan, Steve N.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20000057422},
  note = {Source identifier: 20000057422}
}