@misc{W2097089247,
  author = {Kamal Nigam and Andrew Kachites McCallum and Sebastian Thrun and Tom M. Mitchell},
  title = {Text Classification from Labeled and Unlabeled Documents using EM},
  year = {2000},
  howpublished = {Machine Learning},
  doi = {https://doi.org/10.1023/a:1007692713085}
}