Bruce M. Horowitz. Elementary formal systems as a framework for relative recursion theory. Notre Dame Journal of Formal Logic, 23(1):39-52, 1982. [doi]
@article{Horowitz82,
title = {Elementary formal systems as a framework for relative recursion theory},
author = {Bruce M. Horowitz},
year = {1982},
doi = {10.1305/ndjfl/1093883564},
url = {http://dx.doi.org/10.1305/ndjfl/1093883564},
researchr = {https://researchr.org/publication/Horowitz82},
cites = {0},
citedby = {0},
journal = {Notre Dame Journal of Formal Logic},
volume = {23},
number = {1},
pages = {39-52},
}