1. Lecture Notes in Mathematics, Vol. 354;Devlin, Keith J.,1973
2. 2. S. D. Friedman, Recursion on inadmissible ordinals, Ph. D. Thesis, Massachusetts Institute of Technology, 1976.
3. Some minimal pairs of 𝛼-recursively enumerable degrees;Lerman, Manuel;Ann. Math. Logic,1972
4. Inadmissibility, tame r.e. sets and the admissible collapse;Maass, Wolfgang;Ann. Math. Logic,1978
5. The 𝛼-finite injury method;Sacks, G. E.;Ann. Math. Logic,1972