R Hermann1. Show Affiliations » 1. DEPARTMENT OF MATHEMATICS, NORTHWESTERN UNIVERSITY.
Abstract
Year: 1964 PMID: 16591152 PMCID: PMC300094 DOI: 10.1073/pnas.51.3.456
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205