Stichting Mathematisch Centrum
Stichting Mathematisch Centrum. Zuivere Wiskunde

Kroonenberg, N. (1970). On an example of hanf : Spaces with infinitely many isolated points, such that n isolated points can be left out, but not 1, 2, .., n-1. Stichting Mathematisch Centrum. Zuivere Wiskunde. Stichting Mathematisch Centrum.