On structure of upper semicontinuity

Topologies on spaces of subsets

Ernest Michael · Transactions of the American Mathematical Society · 1951 · 995 citations · Full text

Such Collections, Topological Property, Set-theoretic Topology +1

A note on closed maps and compact sets

E. Michael · Israel Journal of Mathematics · 1964 · 156 citations

Closed Maps, Topological Property, Extremal Set Theory +1

Mappings and realcompact spaces

Nancy Dykes · Pacific Journal of Mathematics · 1969 · 70 citations · Full text

Hausdorff Space X, Realcompact Spaces, Perfect Maps +4

Subcontinuity for multifunctions

R. E. Smithson · Pacific Journal of Mathematics · 1975 · 63 citations · Full text

Metric characterizations of upper semicontinuity

Szymon Dolecki, S. Rolewicz · Journal of Mathematical Analysis and Applications · 1979 · 38 citations

Topological Semigroups, Set-theoretic Topology, Topological Property +2