Massih-Reza Amini Nicolas Usunier Patrick Gallinari Automatic Text Summarization Based on Word-Clusters and Ranking Algorithms. 142-156 https://doi.org/10.1007/978-3-540-31865-1_11 2005 conf/ecir/2005 ECIR db/conf/ecir/ecir2005.html#AminiUG05