@inproceedings{unsupervisedconceptrepresentationlearnin,
  title = {Unsupervised Concept Representation Learning for Length-Varying Text Similarity},
  author = {Xuchao Zhang and Bo Zong and Wei Cheng and Jingchao Ni and Yanchi Liu and Haifeng Chen},
  year = {2021},
  booktitle = {NAACL 2021 4},
  url = {https://aclanthology.org/2021.naacl-main.445},
}