@misc{indiciaeab07435e62ac,
  title = {A DIGITAL ORTHOGONAL MODEL FOR NONLINEAR PROCESSES WITH TWOLEVEL INPUTS},
  author = {De Russo, P. M. and Roy, R.},
  year = {1962},
  url = {https://ntrs.nasa.gov/citations/19630004194},
  note = {Source identifier: 19630004194}
}