@misc{indiciae0221bf94b360,
  title = {Applications of a mathematical programming technique to finite thrust rocket trajectory optimization},
  author = {Armstrong, E. S. and Childs, A. G. and Markos, A. T.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710062287},
  note = {Source identifier: 19710062287}
}