J Schwinger1. Show Affiliations » 1. HARVARD UNIVERSITY.
Abstract
Year: 1960 PMID: 16590645 PMCID: PMC222876 DOI: 10.1073/pnas.46.4.570
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205