@misc{indiciaec37c3d845075,
  title = {Optimum controllers for linear closed-loop systems},
  author = {Boksenbom, Aaron S and Novik, David and Heppler, Herbert},
  year = {1953},
  url = {https://ntrs.nasa.gov/citations/19930083669},
  note = {Source identifier: 19930083669}
}