%0 Journal Article %A Barr, Michael %T Fuzzy Set Theory and Topos Theory %J Canadian mathematical bulletin %D 1986 %P 501-508 %V 29 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1986-079-9/ %R 10.4153/CMB-1986-079-9 %F 10_4153_CMB_1986_079_9