Introduction to the Special Issue on Summarization Dragomir R Radev author Eduard Hovy author Kathleen McKeown author 2002 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal radev-etal-2002-introduction 10.1162/089120102762671927 https://aclanthology.org/J02-4001/ 2002 28 4 399 408