Summarization of Multi-Document Topic Hierarchies using Submodular Mixtures Ramakrishna Bairi author Rishabh Iyer author Ganesh Ramakrishnan author Jeff Bilmes author 2015-07 text Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) Chengqing Zong editor Michael Strube editor Association for Computational Linguistics Beijing, China conference publication bairi-etal-2015-summarization 10.3115/v1/P15-1054 https://aclanthology.org/P15-1054/ 2015-07 553 563