Media type: E-Article Title: Top- \(k\) Approximate Answers to XPath Queries with Negation Contributor: Fazzinga, Bettina; Flesca, Sergio; Pugliese, Andrea Published: Institute of Electrical and Electronics Engineers (IEEE), 2014 Published in: IEEE Transactions on Knowledge and Data Engineering, 26 (2014) 10, Seite 2561-2573 Language: Not determined DOI: 10.1109/tkde.2013.150 ISSN: 1041-4347 Keywords: Computational Theory and Mathematics ; Computer Science Applications ; Information Systems Origination: Footnote: