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.
Wei Cheng, Zhi Wen Mo, Jue Wang. Notes on the lower and upper approximations in a fuzzy group and rough ideals in semigroups . Inf. Sci., 177(22):5134-5140, 2007. [doi]