RSCTC - International Conference on Rough Sets and Current Trends in Computing 1998 Rough sets and current trends in computing : first international conference, RSCTC' 98, Warsaw, Poland, June 22 - 26, 1998 ; proceedings List of contributions Rough sets and current trends in computing : first international conference, RSCTC' 98, Warsaw, Poland, June 22 - 26, 1998 ; proceedings List of contributions