1. Minimal degrees and the jump operator;Cooper;J. Symbolic Logic,1973
2. Simple proofs of some theorems on high degrees of unsolvability;Jockusch;Canad. J. Math.,1977
3. Degrees of generic sets;Jockusch,1980
4. Double jumps of minimal degrees;Jockusch;J. Symbolic Logic,1978
5. Degrees of Unsolvability;Lerman,1983