@inproceedings{neuralabstractivemultidocument,
  title = {Neural Abstractive Multi-Document Summarization: Hierarchical or Flat Structure?},
  author = {Ye Ma and Lu Zong},
  year = {2020},
  booktitle = {AACL (iwdp) 2020 12},
  url = {https://aclanthology.org/2020.iwdp-1.6},
}