@inproceedings{atrainingfreeandreferencefree,
  title = {A Training-free and Reference-free Summarization Evaluation Metric via Centrality-weighted Relevance and Self-referenced Redundancy},
  author = {Wang Chen and Piji Li and Irwin King},
  year = {2021},
  booktitle = {ACL 2021 5},
  eprint = {2106.13945},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2106.13945v1},
}