@misc{indiciae6270844cbb8a,
  title = {Algebraic methods in system theory},
  author = {Brockett, R. W. and Willems, J. C. and Willsky, A. S.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750017578},
  note = {Source identifier: 19750017578}
}