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A topological application of flat morasses
Fundamenta Mathematicae issue 1 volume 194 page 45-66 (May 2007)
Categories of topological spaces and scattered theories
Notre Dame Journal of Formal Logic issue 1 volume 48 page 53-77 (May 2007)
Characterising continuous functions on compact spaces.
Advances in Mathematics issue 2 volume 206 page 695-728 (November 2006)
Nonhyperbolic one-dimensional invariant sets with a countably infinite collection of inhomogeneities
Fundamenta Mathematicae issue 3 volume 192 page 267-289 (2006)
Ubiquity of free subgroups.
Bulletin of the London Mathematical Society issue 5 volume 35 page 624-634 (September 2003)