@inproceedings{aphrasediscoveringtopicmodelusing,
  title = {A Phrase-Discovering Topic Model Using Hierarchical Pitman-Yor Processes},
  author = {Robert Lindsey and William Headden and Michael Stipicevic},
  year = {2012},
  booktitle = {EMNLP 2012 7},
  url = {https://aclanthology.org/D12-1020},
}