Xiaoxue Song Wen-Xiu Zhang An Axiomatic Characterization of Fuzzy Formal Contexts Based on T-implication Operators. 509-512 2008 ISCSCT (2) https://doi.org/10.1109/ISCSCT.2008.218 https://doi.ieeecomputersociety.org/10.1109/ISCSCT.2008.218 conf/iscsct/2008 db/conf/iscsct/iscsct2008-2.html#SongZ08