S. Bryant, A. Forte, и A. Bruckman. GROUP '05: Proceedings of the 2005 international ACM SIGGROUP conference on Supporting group work, стр. 1--10. New York, NY, USA, ACM Press, (2005)
C. Cattuto, D. Benz, A. Hotho, и G. Stumme. The Semantic Web -- ISWC 2008, том 5318 из Lecture Notes in Computer Science, стр. 615--631. Berlin/Heidelberg, Springer, (2008)
N. Chinchor. Proceedings of the Seventh Message Understanding Conference (MUC-7), стр. 21 pages. Fairfax, VA, (апреля 1998)version 3.5, http://www.itl.nist.gov/iaui/894.02/related\_projects/muc/.
C. Curino, E. Quintarelli, и L. Tanca. Proc. IEEE of 2nd Int. Workshop on Database Interoperability (InterDB 2006), стр. 5-5. Atlanta, USA, (апреля 2006)