Youngwan Cho Kichul Lee Mignon Park Fuzzy Modeling by Occupancy Degree and Optimal Partition of Projection Using Rough Set Theory. 54-61 1998 2 J. Adv. Comput. Intell. Intell. Informatics 2 https://doi.org/10.20965/jaciii.1998.p0054 db/journals/jaciii/jaciii2.html#ChoLP98