@misc{indiciaee055c7dc8b9c,
  title = {A Spectral Lyapunov Function for Exponentially Stable LTV Systems},
  author = {Zhu, J. Jim and Liu, Yong and Hang, Rui},
  year = {2010},
  url = {https://ntrs.nasa.gov/citations/20100023312},
  note = {Source identifier: 20100023312}
}