G D Birkhoff1. Show Affiliations » 1. Department of Mathematics, Harvard University.
Abstract
Year: 1931 PMID: 16577405 PMCID: PMC1076137 DOI: 10.1073/pnas.17.12.650
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205