1. With J. L. Hirst. Partitions of trees and ACA'. Archive for Mathematical Logic, Volume 48, Number 3, 2009, pages 227-230. DOI 10.1007/s00153-009-0122-x.

2. Automorphisms of the truth-table degrees are fixed on a cone. Journal of Symbolic Logic, Volume 74 Number 2, June 2009, pages 679-688.

3. Reals n-generic relative to some perfect tree. Journal of Symbolic Logic, Volume 73 Number 2, June 2008, pages 401-411.

4. Relatively recursively enumerable reals. Preprint.

5. Relative properties of reals. PhD Thesis.