@inproceedings{toutanova2001text,
 author = {Kristina Toutanova and Francine Chen and Kris Popat and Thomas Hofmann},
 booktitle = {Tenth International ACM Conference on Information and Knowledge Management (CIKM 2001)},
 title = {Text Classification in a Hierarchical Mixture Model for Small Training Sets},
 url = {https://nlp.stanford.edu/pubs/toutanova2001text.pdf},
 year = {2001}
}