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.
Congxin Wu, Fachao Li. Fuzzy metric and convergences based on the symmetric difference. Fuzzy Sets and Systems, 108(3):325-332, 1999. [doi]