Tree Kernels for Machine Translation Quality Estimation Christian Hardmeier author Joakim Nivre author Jörg Tiedemann author 2012-06 text Proceedings of the Seventh Workshop on Statistical Machine Translation Chris Callison-Burch editor Philipp Koehn editor Christof Monz editor Matt Post editor Radu Soricut editor Lucia Specia editor Association for Computational Linguistics Montréal, Canada conference publication hardmeier-etal-2012-tree https://aclanthology.org/W12-3112/ 2012-06 109 113