1. Minimal degrees recursive in 1-generic degrees. To appear.
2. Minimal degrees and 1-generic in higher recursion theory, II. To appear.
3. and , Minimal degrees below 0′ and 1-generic degrees. In preparation.
4. Degrees of generic sets. In: Proc. Logic. Leeds 1979, Cambridge Univ. Press, Cambridge—New York 1980, pp. 110–139.
5. Degrees of Unsolvability. Perspectives in Mathematical Logic, Springer-Verlag, Berlin—Heidelberg—New York 1984.