On the uniqueness of Lyapunov matrices for a time-delay system

@article{Kharitonov2012OnTU,
  title={On the uniqueness of Lyapunov matrices for a time-delay system},
  author={Vladimir L. Kharitonov},
  journal={Systems & Control Letters},
  year={2012},
  volume={61},
  pages={397-402}
}