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.
Grant Lewison, Guillermo Paraje. The classification of biomedical journals by research level. Scientometrics, 60(2):145-157, 2004. [doi]
Abstract is missing.