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.
Pier Luigi Ferrari. The Rank Function and Hilbert'S Second ϵ-Theorem. Math. Log. Q., 35(4):367-373, 1989. [doi]
Abstract is missing.