@ARTICLE{TCR96,
  author = {Tsiotras, P. and Corless, M. and Rotea, M.},
  title = {Counter-example to a recent result on the stability of nonlinear systems},
  journal = {IMA Journal of Math. Control and Information},
  year = {1996},
  volume = {13},
  pages = {129--130},
  number = {2}
}