- TextRank: https://web.eecs.umich.edu/~mihalcea/papers/mihalcea.emnlp04.pdf
- SentenceEmbedding: https://openreview.net/pdf?id=SyK00v5xx
- InformationRetrievalAndTextMining: https://github.com/Artificial-Intelligence-for-NLP-Chinese/References/tree/master/information-retrieve