1. On the combinatorial principle P(c);Bell;Fund. Math.,1981
2. The Theory of Ultrafilters;Comfort,1974
3. Remote Points;van Douwen;Dissertationes Math.,1981
4. The integers and topology;van Douwen,1984
5. The Sorgenfrey line has no connected compactification;Emeryk;Comm. Math. Univ. Carolin.,1977