Sheaves with values in a category

Homology theory for locally compact spaces.

Armand Borel, John C. Moore · The Michigan Mathematical Journal · 1960 · 194 citations · Full text

Natural Sciences, Mathematics, Topology +11

Adjoint functors

Daniel M. Kan · Transactions of the American Mathematical Society · 1958 · 193 citations · Full text

Classes of extensions and resolutions

M. C. R. Butler, Gary Horrocks · Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences · 1961 · 88 citations

Natural Sciences, Mathematics, Algebra +16

On the Category of Sheaves

Alex Heller, K. A. Rowe · American Journal of Mathematics · 1962 · 12 citations

Natural Sciences, Biology, Systematics +4