Polkowski L. Granular Computing in Decision Approximation. An Application of Rough Mereology / L. Polkowski, P. Artiemjew, 2015 r=on-line. - Текст : электронный.
Rough set methods and applications : New developments in knowledge discovery in information systems / Ed. L. Polkowski, 2000. - X, 681 p. 681 p. - Текст : непосредственный.