Rough and Fuzzy-Rough Classification Methods Implemented in RClass System. - Grzegorz Drwal (Rough Sets and Current Trends in Computing, 2000)

Induction of fuzzy decision rules based upon rough sets theory. - Grzegorz Drwal; Marek Sikora (FUZZ-IEEE, 2004)

Fuzzy Decision Support System with Rough Set Based Rules Generation Method. - Grzegorz Drwal; Marek Sikora (Rough Sets and Current Trends in Computing, 2004)