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.
V. Wiktor Marek, Miroslaw Truszczynski. Contributions to the Theory of Rough Sets. Fundamenta Informaticae, 39(4):389-409, 1999.