@article{WaB:03,
  author =	 {F. Wang and V. Balakrishnan},
  title =	 {Robust Steady-State Filtering for Systems with Deterministic
  and Stochastic Uncertainties},
   volume = 51,
   number = 10,
   pages = {2550-2558},
   month = oct,
   journal = tsp,
   year=2003
}