1. Bast, H., Majumdar, D., Theobald, M., Schenkel, R., Weikum, G.: IO-Top-k: Index-optimized top-k query processing. In: VLDB, pp. 475–486 (2006)
2. Lecture Notes in Computer Science;A. Broschart,2008
3. Clarke, C.L.A.: Controlling overlap in content-oriented XML retrieval. In: Baeza-Yates, R.A., Ziviani, N., Marchionini, G., Moffat, A., Tait, J. (eds.) SIGIR, pp. 314–321. ACM Press, New York (2005)
4. Denoyer, L., Gallinari, P.: The Wikipedia XML Corpus. In: SIGIR Forum (2006)
5. Fagin, R., Lotem, A., Naor, M.: Optimal aggregation algorithms for middleware. In: PODS. ACM Press, New York (2001)