@article{lafferty2001,
  title={Conditional Random Fields: Probabilistic Models for Segmenting and Labeling Sequence Data},
  author={John Lafferty and Andrew McCallum and Fernando C. N. Pereira},
  year={2001},
  journal={ScholarlyCommons (University of Pennsylvania)},
  url={https://knowledgetrend.com/paper/conditional-random-fields-probabilistic-models-for-segmenting-and-labeling-sequence-data}
}