Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Andrzej Skowron, Jaroslaw Stepaniuk. Hierarchical modelling in searching for complex patterns: constrained sums of information systems. J. Exp. Theor. Artif. Intell., 17(1-2):83-102, 2005. [doi]