ArticleFree bases for normal subgroups of free groupsDaniel E. Cohen·Roger C. Lyndon·1963·enABIABI:AkademIndex/openalex/2026.other.370150CiteAbstractNo abstract available.IdentifiersDOI10.1090/s0002-9947-1963-0170930-9Citations and referencesCited by 50 referencesMetrics — AkademScholar