@article{ramezani_marcus_2002, 
  title={Estimation of hidden markov models: risk-sensitive filter banks and qualitative analysis of their sample paths}, 
  volume={47}, 
  DOI={10.1109/tac.2002.805686}, 
  number={12}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={Ramezani and Marcus}, 
  year={2002}
  }