1. Inverting onto functions and polynomial hierarchy;Buhrman,2007
2. Relative to a random oracle PA≠NPA≠coNPA with probability 1;Bennett;SIAM Journal on Computing,1981
3. Equivalence relations, invariants, and normal forms II;Blass,1984
4. Quantitative relativizations of complexity classes;Book;SIAM Journal on Computing,1984
5. Elementary theories;Ershov;Uspechi Matematicheskikh Nauk,1965