On Consistent and Partially Consistent Extensions of Information Systems. - Zbigniew Suraj; Krzysztof Pancerz; Grzegorz Owsiany (RSFDGrC (1), 2005)

Validation of Data Categorization Using Extensions of Information Systems: Experiments on Melanocytic Skin Lesion Data. - Krzysztof Pancerz; Grzegorz Owsiany; Lukasz Piatek (FedCSIS, 2011)