SPECTER: Document-level Representation Learning using Citation-informed Transformers Arman Cohan author Sergey Feldman author Iz Beltagy author Doug Downey author Daniel Weld author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication cohan-etal-2020-specter 10.18653/v1/2020.acl-main.207 https://aclanthology.org/2020.acl-main.207/ 2020-07 2270 2282