Discretization of Condition Attributes Space. - Andrzej Lenarcik; Zdzislaw Piasta (Intelligent Decision Support, 1992)

Questionnaire Analysis by Decision Algorithm Generation. - Krzysztof Grysa; Andrzej Lenarcik; Zdzislaw Piasta; Ewa Ramocka; Maciej Sekalski (ICCI, 1992)

Probabilistic Approach to Attributes Coding in the Rough Sets Theory. - Andrzej Lenarcik; Zdzislaw Piasta; Mateusz Masternak (ICCI, 1992)

Rough Classifiers. - Andrzej Lenarcik; Zdzislaw Piasta (RSKD, 1993)

Rough Classifiers Sensitive to Costs Varying from Object to Object. - Andrzej Lenarcik; Zdzislaw Piasta (Rough Sets and Current Trends in Computing, 1998)