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.
Carlos A. Di Prisco, V. Wiktor Marek. On Some σ-Algebras Containing the Projective Sets I. Math. Log. Q., 28(33-38):525-538, 1982. [doi]