1. Bast, H., Majumdar, D., Theobald, M., Schenkel, R., Weikum, G.: IO-Top-k: Index-optimized top-k query processing. In: Proceedings of the 32nd International Conference on Very Large Data Bases (VLDB 2006), pp. 475–486 (2006)
2. Theobald, M., Bast, H., Majumdar, D., Schenkel, R., Weikum, G.: Topx: efficient and versatile top-k query processing for semistructured data. VLDB J. (accepted for publication 2008)
3. Theobald, M., Broschart, A., Schenkel, R., Solomon, S., Weikum, G.: Topx – adhoc track and feedback task. In: Proceedings of the 5th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2006), pp. 233–242 (2006)
4. Theobald, M., Schenkel, R., Weikum, G.: Efficient and self-tuning incremental query expansion for top-k query processing. In: Proceedings of the 28th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, pp. 242–249 (2005)
5. Theobald, M., Schenkel, R., Weikum, G.: An efficient and versatile query engine for TopX search. In: Proceedings of the 31st International Conference on Very Large Data Bases (VLDB 2005), pp. 625–636 (2005)