@inproceedings{Bobillo09b, Author = {Fernando Bobillo and Umberto Straccia}, Booktitle = {Proceedings of the 13th World Congress of the International Fuzzy Systems Association and 6th Conference of the European Society for Fuzzy Logic and Technology (IFSA-EUSFLAT 2009)}, Editor = {Jo\~{a}o P. B. Carvalho and Didier Dubois and Uzay Kaymak and Jo\~{a}o M. C. Sousa}, Month = {July}, Pages = {189--194}, Title = {Fuzzy Description Logics with Fuzzy Truth Values}, Year = {2009}}