Inverse Document Density: A Smooth Measure for Location-Dependent Term Irregularities Dennis Thom author Harald Bosch author Thomas Ertl author 2012-12 text Proceedings of COLING 2012 Martin Kay editor Christian Boitet editor The COLING 2012 Organizing Committee Mumbai, India conference publication thom-etal-2012-inverse https://aclanthology.org/C12-1159/ 2012-12 2603 2618