@misc{indiciaefcd447e265d1,
  title = {A nonlinear programming approach for optimizing two-stage lifting vehicle ascent to orbit},
  author = {Kamm, J. L. and Johnson, I. L.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19740034046},
  note = {Source identifier: 19740034046}
}