@inproceedings{countbasedstatemergingforprobabilistic,
  title = {Count-based State Merging for Probabilistic Regular Tree Grammars},
  author = {Toni Dietze and Mark-Jan Nederhof},
  year = {2015},
  booktitle = {WS 2015 1},
  url = {https://aclanthology.org/W15-4804},
}