1. Agarwal, S., Lamparter, S.: Smart: a semantic matchmaking portal for electronic markets. In: CEC 2005: Proceedings of the Seventh IEEE International Conference on E-Commerce Technology (CEC 2005), pp. 405–408. IEEE Computer Society, Washington (2005)
2. Andreasen, T., Bulskov, H.: Conceptual querying through ontologies. Fuzzy Sets Syst. 160(15), 2159–2172 (2009)
3. Baader, F., Calvanese, D., McGuinness, D., Nardi, D., Patel-Schneider, P.F. (eds.): The Description Logic Handbook: Theory, Implementation, and Applications. Cambridge University Press, Cambridge (2003)
4. Baader, F., Peñaloza, R.: Are fuzzy description logics with general concept inclusion axioms decidable? In: Proceedings of 2011 IEEE International Conference on Fuzzy Systems (Fuzz-IEEE 2011). IEEE Press (2011)
5. Baader, F., Peñaloza, R.: GCIs make reasoning in fuzzy DLs with the product T-norm undecidable. In: Proceedings of the 24th International Workshop on Description Logics (DL-11). CEUR Electronic Workshop Proceedings (2011)