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.
Peter A. Cholak, Peter G. Hinman. Iterated relative recursive enumerability. Arch. Math. Log., 33(5):321-346, 1994. [doi]