Improving Diversity in Ranking using Absorbing Random Walks Xiaojin Zhu author Andrew Goldberg author Jurgen Van Gael author David Andrzejewski author 2007-04 text Human Language Technologies 2007: The Conference of the North American Chapter of the Association for Computational Linguistics; Proceedings of the Main Conference Candace Sidner editor Tanja Schultz editor Matthew Stone editor ChengXiang Zhai editor Association for Computational Linguistics Rochester, New York conference publication zhu-etal-2007-improving https://aclanthology.org/N07-1013/ 2007-04 97 104