Andrzej Jankowski Andrzej Skowron Marcin S. Szczuka Interactive Granular Computing in Rightly Judging Systems. 1-16 2009 RSKT http://dx.doi.org/10.1007/978-3-642-02962-2_1 conf/rskt/2009 db/conf/rskt/rskt2009.html#JankowskiSS09