Optimization-based Content Selection for Opinion Summarization Jackie Chi Kit Cheung author Giuseppe Carenini author Raymond T Ng author 2009-08 text Proceedings of the 2009 Workshop on Language Generation and Summarisation (UCNLG+Sum 2009) Anja Belz editor Roger Evans editor Sebastian Varges editor Association for Computational Linguistics Suntec, Singapore conference publication cheung-etal-2009-optimization https://aclanthology.org/W09-2804/ 2009-08 7 14