Referring Expressions as Formulas of Description Logic Carlos Areces author Alexander Koller author Kristina Striegnitz author 2008-06 text Proceedings of the Fifth International Natural Language Generation Conference Michael White editor Crystal Nakatsu editor David McDonald editor Association for Computational Linguistics Salt Fork, Ohio, USA conference publication areces-etal-2008-referring https://aclanthology.org/W08-1107/ 2008-06 42 49