K-Theory · 1999 · 12 citations · 7 references
Natural SciencesBiologyTopologyCategory TheoryCohomology TheoryGroup TheoryHomological AlgebraHomology TheoryHomotopy TheoryGroup HomologyHomologyHomology Groups
7
Van Kampen theorems for diagrams of spaces
Ronald Brown, Jean-Louis Loday · Topology · 1987 · 404 citations
A Combinatorial Definition of Homotopy Groups
Daniel M. Kan · Annals of Mathematics · 1958 · 204 citations