[1] Baader F, Calvanese D, McGuinness D L, et al.The description logic handbook:theory, implementation, and applications [M].Cambridge:Cambridge University Press, 2003.
[2] Straccia U.Reasoning within fuzzy description logics [J].Journal of Artificial Intelligence Research, 2001, 14:137-166.
[3] Lu Jianjiang, Xu Baowen, Li Yanhui, et al.A family of extended fuzzy description logics [J].International Journal of Business Intelligence and Data Mining, 2006, 1(4):384-400.
[4] Li Yanhui, Xu Baowen, Lu Jianjiang, et al.An extended fuzzy description logic [J].Journal of Southeast University:Natural Science Edition, 2005, 35(5):683-687.(in Chinese)
[5] Li Yanhui, Xu Baowen, Lu Jianjiang, et al.On the computational complexity of the extended fuzzy description logic with numerical constraints [J]. Journal of Software, 2006, 17(5):968-975.(in Chinese)
[6] Li Yanhui, Lu Jianjiang, Xu Baowen, et al.A fuzzy extension of description logic ALCH [C]//Lecture Notes in Artificial Intelligence. Springer-Verlag, 2005, 3789:152-161.
[7] Baader F, Sattler U.An overview of tableau algorithms for description logics [J].Studia Logica, 2001, 69(1):5-40.