Mathematische Annalen · 1968 · 28 citations · 7 references
Natural SciencesArchitectural RepresentationAlgebraAbstract AlgebraCategory TheoryGalois TheoryGroup TheoryInvariant TheoryTopological GroupsFinite Abelian GroupsGalois ExtensionsLifting Criterion
7
Homology and direct sums of countable Abelian groups
R. J. Nunke · Mathematische Zeitschrift · 1967 · 109 citations
Direct sums of countable groups
George Kolettis · Duke Mathematical Journal · 1960 · 38 citations
Leo Zippin · Annals of Mathematics · 1935 · 35 citations