@misc{indiciaed05b6dbbb8b3,
  title = {Theory of optimum discrete time systems.},
  author = {Halkin, H. and Jordan, B. W. and Polak, E. and Rosen, J. B.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660057567},
  note = {Source identifier: 19660057567}
}