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.
Mitsuru Uchiyama. Proofs of Korovkin's Theorems via Inequalities. The American Mathematical Monthly, 110(4):334-336, 2003. [doi]
Abstract is missing.