- Andrzej Skowron, Jaroslaw Stepaniuk, James F. Peters, Roman W. Swiniarski:
Calculi of Approximation Spaces. Fundam. Informaticae 72(1-3): 363-378 (2006) - Jerzy Stefanowski, Szymon Wilk:
Rough Sets for Handling Imbalanced Data: Combining Filtering and Rule-based Classifiers. Fundam. Informaticae 72(1-3): 379-391 (2006) - Zbigniew Suraj, Neamat El Gayar, Pawel Delimata:
A Rough Set Approach to Multiple Classifier Systems. Fundam. Informaticae 72(1-3): 393-406 (2006) - Józef Winkowski:
An Axiomatic Characterization of Algebras of Processes of Petri Nets. Fundam. Informaticae 72(1-3): 407-420 (2006) - Marcin Wolski:
Complete Orders, Categories and Lattices of Approximations. Fundam. Informaticae 72(1-3): 421-435 (2006)
