Preface. In Antonela Tommasel, Daniela Godoy, Arkaitz Zubiaga, editors, Proceedings of the Second Workshop on Online Misinformation- and Harm-Aware Recommender Systems co-located with 15th ACM Conference on Recommender Systems (RecSys 2021), Virtual Event, Amsterdam, The Netherlands, October 2, 2021. Volume 3012 of CEUR Workshop Proceedings, CEUR-WS.org, 2021. [doi]
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