A. Strominger. (2009)cite arxiv:0906.1313
Comment: 11 pages, based on lectures given at the 2008 Cargese Summer School
and to appear in the proceedings.
R. Wetzker, W. Umbrath, und A. Said. ESAIR '09: Proceedings of the WSDM '09 Workshop on Exploiting Semantic Annotations in Information Retrieval, Seite 25--29. New York, NY, USA, ACM, (2009)