Forecasting Welsh Ambulance Demand using Singular Spectrum Analysis

@article{williams2011forecasting,
  title   = {Forecasting {W}elsh Ambulance Demand using Singular Spectrum
             Analysis},
  author  = {Williams, Janet E. and Gillard, Jon and Harper, Paul R. and
             Knight, Vincent A.},
  journal = {Journal of the Operational Research Society},
  year    = {2011},
}