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.
H. Jerome Keisler. Nonstandard arithmetic and recursive comprehension. Annals of Pure and Applied Logic, 161(8):1047-1062, 2010. [doi]
Abstract is missing.