1. Preferences, Queries, Logics. DBRank'11, August 2011, Seattle, Washington. Keynote talk.

  2. Preference Queries over Sets. ICDE'11, April 2011, Hannover, Germany.

  3. Foundations of Preference Queries. Lectures given at University of Calabria, May 2010.

  4. Discovering Relative Importance of Skyline Attributes. VLDB'09, August 2009, Lyon, France.

  5. Semantics and Evaluation of Top-K Queries in Probabilistic Databases. September 2008.

  6. Database Consistency: Logic-Based Approaches. Lectures given at Warsaw University (April 2007), University of Calabria (June 2007), and Free University of Bozen-Bolzano (June 2008).

  7. Valid Query Answers for XML. June 2007.

  8. Consistent Query Answering: Five Easy Pieces. ICDT'07, January 2007, Barcelona, Spain. Keynote talk. Slightly updated version (invited tutorial at SUM'08).

  9. Consistent Query Answering: Opportunities and Limitations. LAAIC, September 2006, Cracow, Poland. Keynote talk.

  10. Validity-Sensitive Querying of XML Databases. DataX, March 2006. Munich, Germany.

  11. Iterative Modification and Incremental Evaluation of Preference Queries. FOIKS, February 2006, Budapest, Hungary. Requires TexPoint. PDF version.

  12. Consistent Query Answers in Inconsistent Databases. April 2006.

  13. Towards a Decision Query Language. Italian Symposium on Databases (SEBD), June 2004, Pula, Italy. Keynote talk. Updated version, May 2006.

  14. Semantic Optimization of Preference Queries. Symposium on Applications of Constraint Databases, June 2004, Paris, France.

  15. Optimization of Preference Queries. Dagstuhl seminar 04271 "Preferences," June 2004.

  16. Consistent Query Answering: Recent Developments and Future Directions. Sixth IFIP TC-11 WG 11.5 Working Conference on Integrity and Internal Control in Information Systems, November 2003, Lausanne, Switzerland. Keynote talk.

  17. Towards Practical Computation of Consistent Query Answers. COLOGNET Workshop on Logic-based Methods for Information Integration, August 2003, Vienna, Austria.

  18. Consistent Answers to Quantifier-Free Queries. Dagstuhl Seminar 03241, June 2003.

  19. Database Challenges of Spatiotemporal Data. Workshop on Spatiotemporal Data Models for Biogeophysical Fields, April 2002, San Diego, California. Invited talk.

  20. Data Models and Query Languages for Spatiotemporal Databases. Workshop on Complex Reasoning on Geographical Data, December 2001, Paphos, Cyprus. Invited talk.

  21. Logic-based Approaches to Novel Applications of Databases. September 2001.

  22. Scalar Aggregation in FD-Inconsistent Databases. January 2001.

  23. Conflict Resolution in Policy Management. October 2000.

  24. Temporal Databases. March 1998. Presented at EDBT'98 and ICTL'97.