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.
Leonard F. Klosinski, Gerald L. Alexanderson, Loren C. Larson. The Sixty-Seventh William Lowell Putnam Mathematical Competition. The American Mathematical Monthly, 114(8):714-724, 2007. [doi]