Aggretriever: A Simple Approach to Aggregate Textual Representations for Robust Dense Passage Retrieval Sheng-Chieh Lin author Minghan Li author Jimmy Lin author 2023 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal lin-etal-2023-aggretriever 10.1162/tacl_a_00556 https://aclanthology.org/2023.tacl-1.26/ 2023 11 436 452