@inproceedings{reich_simos_psihoyios_tsitouras_2010, 
  title={Ensemble Kalman and H[sub ∞] Filters}, 
  DOI={10.1063/1.3498332}, 
  publisher={AIP}, 
  author={Reich and Simos and Psihoyios and Tsitouras}, 
  year={2010}
  }