1. Structural Complexity I;Balcázar,1988
2. Relativisations of the P = NP question;Baker;SIAM J. Comp.,1981
3. F.A. Bäuerle, Ph.D. Thesis, University of California at San Diego, La Jolla, CA 92093.
4. Relative to a random oracle A, PA ≠ NPA ≠ Co-NPA with probability 1;Bennett;SIAM J. Comp.,1981
5. On splitting recursive sets;Breidbart;J. Comput. System Sci.,1978