Masahiro Inuiguchi Bingjun Li Rough Set Approach to Information Tables with Imprecise Decisions. 121-130 2008 RSCTC http://dx.doi.org/10.1007/978-3-540-88425-5_13 conf/rsctc/2008 db/conf/rsctc/rsctc2008.html#InuiguchiL08