@misc{indiciae3efc75cf69cd,
  title = {Optimal low-thrust takeoff from an orbit about an oblate planet},
  author = {Jacobson, R. A. and Powers, W. F.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710062340},
  note = {Source identifier: 19710062340}
}