1. Countably indexed ultrafilters;Booth,1969
2. D.D. Booth, A Boolean view of sequential compactness, preprint.
3. Set Theory and the Continuum Hypothesis;Cohen,1969
4. Some examples in topology;Franklin;Trans. Am. Math. Soc.,1971
5. The topological product of two pseudocompact spaces;Frolik;Czechoslovak Math. J.,1960