N-gram Fragment Sequence Based Unsupervised Domain-Specific Document Readability Shoaib Jameel author Xiaojun Qian author Wai Lam author 2012-12 text Proceedings of COLING 2012 Martin Kay editor Christian Boitet editor The COLING 2012 Organizing Committee Mumbai, India conference publication jameel-etal-2012-n https://aclanthology.org/C12-1080/ 2012-12 1309 1326