@article{kur-var-00-distur,
  author = {A. B. Kurzhanski and P. Varaiya},
  title = {On the Reachability Problem under Persistent Disturbances},
  journal = {Doklady Mathematics},
  volume = {61},
  number = {3},
  pages = {3809--3814},
  year = 2000
}