Jöran Beel, Stefan Langer. A Comparison of Offline Evaluations, Online Evaluations, and User Studies in the Context of Research-Paper Recommender Systems. In Sarantos Kapidakis, Cezary Mazurek, Marcin Werla, editors, Research and Advanced Technology for Digital Libraries - 19th International Conference on Theory and Practice of Digital Libraries, TPDL 2015, Poznań, Poland, September 14-18, 2015. Proceedings. Volume 9316 of Lecture Notes in Computer Science, pages 153-168, Springer, 2015. [doi]
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