@misc{indiciae6448459adb03,
  title = {Optium nonlinear control for step and pulse disturbances},
  author = {Chang, R. C. C. and Oldenburger, R.},
  year = {1959},
  url = {https://ntrs.nasa.gov/citations/19640013282},
  note = {Source identifier: 19640013282}
}