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.
Søren Riis. Count(q) Does Not Imply Count(p). Annals of Pure and Applied Logic, 90(1-3):1-56, 1997.