@misc{indiciae90931947dbd1,
  title = {A new matrix theorem and its application for establishing independent coordinates for complex dynamical systems with constraints},
  author = {Steeves, E. C. and Walton, W. C., Jr.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690029270},
  note = {Source identifier: 19690029270}
}