1. On extensions of countable filterbases to ultrafilters and ultrafilter compactness. Issue 2 (19th February 2018) Authors: Herrlich, Horst; Howard, Paul; Keremedis, Kyriakos Journal: Quaestiones mathematicae Issue: Volume 41:Issue 2(2018) Page Start: 213 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗