@inproceedings(2007-conditional-random-fields-vs-hidden-markov-models-in-a-biomedical-named-entity-recognition-task,
  author = {Natalia Ponomareva and Paolo Rosso and Ferran Pla Santamaría and Antonio Molina Marco},
  title = {Conditional Random Fields vs. Hidden Markov Models in a Biomedical Named Entity Recognition Task},
  year = {2007},
  booktitle = {International Conference on Recent Advances in Natural Language Processing (RANLP)},
  address = {Borovets, Bulgaria},
  pages = {479-483}
)