author- Inf. Syst. 37(4):291-293 (2012)
- AIPS, page 74-79. AAAI, (1994)
- AAAI/IAAI, page 623-630. AAAI Press / The MIT Press, (1998)
- AAAI/IAAI, page 948-953. AAAI Press / The MIT Press, (1998)
- FTCS, page 458-463. IEEE Computer Society, (1998)
- AAAI/IAAI, Vol. 1, page 523-529. AAAI Press / The MIT Press, (1996)
- COLING, page 495-500. ACL, (1984)
- AAAI/IAAI, page 649-654. AAAI Press / The MIT Press, (2002)
- J. Comput. Syst. Sci. 78(1):119-141 (2012)
- The Knowledge Engineering Review 18(3):265--280 (May 2004)
- Proceedings of the 2nd European Semantic Web Conference, volume 3532 of Lecture Notes in Computer Science, page 272--289. Berlin, Heidelberg, Springer, (May 2005)
- Proceedings of the 1st European Semantic Web Symposium, volume 3053 of Lecture Notes in Computer Science, page 61--75. Berlin, Heidelberg, Springer, (May 2004)
- On the Move to Meaningful Internet Systems: CoopIS, DOA, and ODBASE, volume 3760 of Lecture Notes in Computer Science, page 347--365. Berlin, Heidelberg, Springer, (2005)
- CoRR (2011)
- Encyclopedia of Database Systems, Springer US, (2009)
- Encyclopedia of Database Systems, Springer US, (2009)
- ICSC, page 352-355. IEEE, (2011)
- World Wide Web 14(5-6):651-669 (October 2011)
- J. Symb. Comput. 32(4):305-332 (2001)
- Fundam. Inform. 39(1-2):39-57 (1999)
