Stefan Dietze Alessio Gugliotta John Domingue Fuzzy context adaptation through conceptual situation spaces. 461-466 2008 FUZZ-IEEE https://doi.org/10.1109/FUZZY.2008.4630409 conf/fuzzIEEE/2008 db/conf/fuzzIEEE/fuzzIEEE2008.html#DietzeGD08