@inproceedings{subtreeextractivesummarizationvia,
  title = {Subtree Extractive Summarization via Submodular Maximization},
  author = {Hajime Morita and Ryohei Sasano and Hiroya Takamura and Manabu Okumura},
  year = {2013},
  booktitle = {ACL 2013 8},
  url = {https://aclanthology.org/P13-1101},
}