Comments on some Wallace's problems on topological semigroups P. Mostert — 1963 Colloquium Mathematicae
A correction to my paper: "Continua meeting an orbit at a point" P. Mostert — 1964 Fundamenta Mathematicae
Compact Groups Acting with (n-1)-Dimensional Orbits on Subspaces of n-Manifolds K H. Hofmann; P. S. Mostert — 1966 Mathematische Annalen