@misc{indiciaedcf623cb940b,
  title = {A graphical test for checking the stability of a linear time-invariant feedback system.},
  author = {Callier, F. M. and Desoer, C. A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730028717},
  note = {Source identifier: 19730028717}
}