1. Recursively enumerable sets in models of ∑2 collection;Chong,1989
2. ∑2-induction and the construction of a high degree;Groszek,1990
3. The Sacks density theorem and ∑2-bounding;Groszek;J. Symbolic Logic,1996
4. M. Groszek, T. Slaman, Foundations of the priority method I: finite and infinite injury, to appear.
5. M. Groszek, T. Slaman, On Turing reducibility, to appear.